Cardiac stimulators

• US 3,241,556 A
• Filed: 05/13/1963
• Issued: 03/22/1966
• Est. Priority Date: 05/17/1962
• Status: Expired due to Term

• Current Assignee: Fred Zacouto
• Original Assignee: Fred Zacouto
• Inventors: FRED ZACOUTO
• Application Number:
  US04/279,984
• Time in Patent Office: 1,044 Days
• US Class Current: 607/9
• CPC Class Codes: A61N 1/3625 External stimulators

Claims

1. A CARDIAC STIMULATOR COMPRISING A PLURALITY OF ELECTRODES FOR INSERTION IN A PATIENT'"'"''"'"'S HEART, A PULSE GENERATOR ADAPTED TO BE LOCATED WITHIN THE PATIENT'"'"''"'"'S BODY AND CONNECTED TO SAID ELECTRODES, A SWITCHING DEVICE ADAPTED TO BE LOCATED INSIDE THE PATIENT'"'"''"'"'S BODY FOR CONTROLLING THE SUPPLY OF ENERGY TO SAID PULSE GENERATOR, AN ENERGY SUPPLY SOURCE ADAPTED TO BE LOCATED WITHIN THE PATIENT'"'"''"'"'S BODY AND CONNECTED TO SAID PULSE GENERATOR VIA SAID SWITCHING DEVICE, AN EXTERNAL CONTROL CIRCUIT COMPRISING A DETECTING DEVICE FOR ELECTRICALLY DETECTING THE CARDIAC RHYTHM OF THE PATIENT, AN AMPLIFIER FOR AMPLIGYING THE OUTPUT CURRENT OF SAID DETECTING DEVICE, AN ELECTRICAL MEMBER CHARGEABLE BY THE OUTPUT OF SAID AMPLIFIER IN DEPENDENCE ON SAID CARDIAC RHYTHM, AN ELECTRICAL MEANS CONNECTED TO SAID CHARGEABLE MEMBER FOR SENSING THE RATE OF CHARGE OF SAID CHARGEABLE MEMBER AND FOR ISSUING AN ELECTRICAL OUTPUT SIGNAL AS LONG AS THE RATE OF CHARGE OF THE CHARGEABLE MEMBER EXCEEDS THE PREDETERMINED VALUE, COUPLING MEANS FOR LOCATION ON THE PATIENT'"'"''"'"'S BODY AND FED WITH ENERGY IN RESPONSE TO THE OUTPUT SIGNAL OF THE EXTERNAL CONTROL CIRCUIT FOR BRINGING ABOUT THE OPEN CIRCUIT POSITION OF THE SWITCHING DEVICE, AS LONG AS SAID EXTERNAL CONTROL CIRCUIT DELIVERS AN OUTPUT SIGNAL CAUSING ENERGY TO BE FED INTO SAID COUPLING MEANS, WHEREBY THE PULSE GENERATOR STARTS OPERATING AND SUPPLYING PULSES TO THE PATIENT'"'"''"'"'S HEART AS SOON AS THE DETECTING DEVICE DETECTS THAT THE CARDIAC RHYTHM DROPS BELOW A PRE-DETERMINED VALUE.