Methods and systems for measuring cardiac parameters
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Abstract
Methods and systems of the present invention provide for measurement of various cardiac parameters. Methods generally involve causing a change in volume and/or pressure in a heart chamber, measuring the change, and calculating at least one cardiac parameter based on the change. Systems typically include at least one actuator, at least one sensor, and a catheter or other device for positioning at least partially in a heart chamber. In some embodiments, the system may also include a controller, such as a computer or other processor, an external actuator, an external sensor, and/or an ECG device. Methods and systems of the invention may be used to more accurately diagnose cardiac conditions in order to make more informed treatment decisions.
221 Citations
93 Claims
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1-78. -78. (canceled)
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79. A system for measuring one or more parameters of a heart, the system comprising:
- a catheter comprising at least one sensor and at least one actuator for introducing a known volume of fluid into at least one chamber of the heart at a selected time during a heart cycle to effect a volume change in the heart chamber;
a fluid source coupled with the catheter for providing fluid to the actuator; and
a processor coupled with the catheter for processing data sensed by the at least one sensor. - View Dependent Claims (80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93)
- a catheter comprising at least one sensor and at least one actuator for introducing a known volume of fluid into at least one chamber of the heart at a selected time during a heart cycle to effect a volume change in the heart chamber;
Specification