Method and device for electronically controlling the beating of a heart

• US 6,912,419 B2
• Filed: 03/12/2003
• Issued: 06/28/2005
• Est. Priority Date: 04/30/1996
• Status: Expired due to Term

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Jonkman, Kenneth R., Hill, Michael R. S.
• Primary Examiner(s): Layno, Carl
• Application Number:
  US10/387,280
• Publication Number:
  US 20040030362A1
• Time in Patent Office: 839 Days
• Field of Search: 607/2, 607 9- 10, 607 39- 41, 607118-119, 607/142
• US Class Current: 607/9
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 2017/00243 cardiac
• CPC Class Codes: A61B 2017/00969 used for transplantation
• CPC Class Codes: A61B 2017/0243 for immobilizing local areas of the heart, e.g. while it beats trocars attached to inner organs or inner body tissue A61B2017/3488
• CPC Class Codes: A61B 2017/3445 used as instrument channel for multiple instruments catheters A61B2017/22072
• CPC Class Codes: A61B 2017/3449 whereby the instrument channels merge into one single channel
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems
• CPC Class Codes: A61N 1/36114 Cardiac control, e.g. by vagal stimulation stimulating the heart A61N1/362
• CPC Class Codes: A61N 1/385 Devices for inducing an abnormal cardiac function, e.g. fibrillation
• CPC Class Codes: A61N 1/3962 in combination with another heart therapy
• CPC Class Codes: A61N 1/39622 Pacing therapy

Abstract

An electro-stimulation device includes a pair of electrodes for connection to at least one location in the body that affects or regulates the heartbeat. The electro-stimulation device both electrically arrests the heartbeat and stimulates the heartbeat. A pair of electrodes are provided for connection to at least one location in the body that affects or regulates the heartbeat. The pair of electrodes may be connected to an intravenous catheter for transvenous stimulation of the appropriate nerve. A first switch is connected between a power supply and the electrodes for selectively supplying current from the power supply to the electrodes to augment any natural stimuli to the heart and thereby stop the heart from beating. A second switch is connected between the power supply and the electrodes for selectively supplying current from the power supply to the electrodes to provide an artificial stimulus to initiate heartbeating. In another aspect, the invention is directed to a method for arresting the beat of a heart in a living body comprising the steps of connecting the pair of electrodes to at least one location in the body that affects or regulates the heartbeat and supplying an electrical current to the electrodes of sufficient amplitude and duration to arrest the heartbeat. The device may also serve to still the lungs by input to a respirator or by stimulation of the phrenic nerve during surgical procedures.

Claims

1. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration within an organ adjacent a nerve that regulates the heart to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

2. The method of claim 1 wherein the organ is a blood vessel.

3. The method of claim 2 wherein the blood vessel is an artery.

4. The method of claim 3 wherein the blood vessel is a carotid artery.

5. The method of claim 1 wherein the blood vessel is a vein.

6. The method of claim 5 wherein the blood vessel is a jugular vein.

7. The method of claim 5 wherein the blood vessel is a superior vena cava.

8. The method of claim 5 wherein the blood vessel is an azygous vein.

9. The method of claim 5 wherein the blood vessel is a hemizygous vein.

10. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to a nerve that regulates the heart and is located in an epicardial fat pad to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

11. The method of claim 10 wherein the epicardial fat pad is located at the right atrium.

12. The method of claim 10 wherein the epicardial fat pad is located at the superior vena cava.

13. The method of claim 10 wherein the epicardial fat pad is located at the right pulmonary vein.

14. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate, wherein the electrical energy is an alternating current;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

15. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate, wherein the electrical energy is a waveform current;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

16. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate, wherein the electrical energy is a direct current;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

17. The method of claim 16 wherein the direct current is a pulsed current.

18. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate, wherein the electrical energy is a continuous pulse train of about 10 to 100 milliamps;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

19. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate, wherein the electrical energy is a constant current of about 10 to 100 milliamps;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

20. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate, wherein the electrical energy is a constant pulse width of about 0.01 to 0.5 milliseconds;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

21. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate, wherein the electrical energy comprises a frequency between about 6 and 50 hertz;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

22. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate, wherein the electrical energy comprises a burst pulse width of current;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

23. The method of claim 22 wherein the burst pulse width of current is programmably controlled.

24. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a regulated power source of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power source of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

25. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply comprising a battery and a regulator of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

26. A methodfor performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate, wherein the electrical energy is applied through at least one set of electrodes located bilaterally;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

27. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate, wherein the electrical energy is applied through at least one set of nerve cuff electrodes;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

28. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of implantable electrodes.

29. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes attached to a transvenous lead.

30. A method for performing a surgical procedure on a heart of a patient compnsing:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes attached to an electrode pad.

31. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes attached to a catheter.

32. The method of claim 31 wherein the electrodes are positioned circumferentially around the catheter.

33. The method of claim 31 wherein the electrodes are positioned axially along the catheter.

34. The method of claim 31 wherein the electrodes are positioned both axially along the catheter and circumferentially around the catheter.

35. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate, wherein electrical energy is applied in response to sensed activity of the heart;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

36. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes and wherein at least one electrode is connected to a sinoatrial region of a heart.

37. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes and wherein at least one electrode is connected to an atrioventricular region of the heart.

38. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes connected in a unipolar arrangement.

39. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes connected in a bipolar arrangement.

40. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes and wherein at least one electrode comprises a corkscrew.

41. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. pefforming a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes and wherein at least one electrode comprises a clip.

42. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes and wherein at least one electrode comprises a pad.

43. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes and wherein at least one electrode comprises a barb.

44. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes and wherein at least one electrode comprises a needle.

45. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes and wherein at least one electrode comprises a lead.

46. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate, wherein the electrical energy is applied through at least one set of electrodes comprising an electrode array of more than two electrodes.

47. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped, wherein the surgical procedure is a diagnostic procedure; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

48. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, wherein the heart is accessed in a minimally-invasive surgical procedure, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

49. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing an endoscopic surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

50. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a minithorascopic surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

51. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate, wherein at least one switch controls the application of the electrical energy, said switch being operated automatically,

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped; and

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate.

52. The method of claim 51 wherein a first switch controls the application of the electrical energy for destimulation of the heart and a second switch controls the application of the electrical energy for stimulation of the heart.

53. The method of claim 51 wherein the at least one switch is operated manually.

54. The method of claim 51 wherein the at least one switch is a hand switch.

55. The method of claim 51 wherein the at least one switch is a foot switch.

56. The method of claim 51 wherein the at least one switch is controlled by a timer which actuates the at least one switch when the selected amount of time has been reached.

57. The method of claim 56 wherein the timer sets off an audible signal to indicate when the selected amount of time has been reached is included.

58. The method of claim 51 wherein the at least one switch intermittently changes between stimulation and destimulation each time the switch is actuated.

59. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped;

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate; and

e. supplying electrical energy of sufficient amplitude and duration to control the patient'"'"'s breathing.

60. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration to destimulate the beating heart and thereby slow or stop the heart rate;

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped;

d. applying electrical energy from the power supply of sufficient amplitude and duration to stimulate the heart and thereby start or increase the heart rate; and

e. activating a respirator to control the patient'"'"'s breathing.

61. A method for performing a surgical procedure on a heart of a patient comprising:

a. surgically accessing the beating heart of the patient, the beating heart having a heart rate;

b. applying electrical energy from a power supply of sufficient amplitude and duration within an organ adjacent a nerve that regulates the heart to destimulate the beating heart and thereby slow or stop the heart rate; and

c. performing a surgical procedure on the heart while the heart rate is slowed or stopped.

62. The method of claim 61 wherein the organ is a blood vessel.

63. The method of claim 62 wherein the blood vessel is an artery.

64. The method of claim 63 wherein the blood vessel is a carotid artery.

65. The method of claim 62 wherein the blood vessel is a vein.

66. The method of claim 65 wherein the blood vessel is a jugular vein.

67. The method of claim 65 wherein the blood vessel is an azygous vein.

68. The method of claim 65 wherein the blood vessel is a hemizygous vein.

69. The method of claim 62 wherein the blood vessel is a superior vena cava.