Pressure-controlled intermittent coronary sinus occlusion appara

Details Pressure-controlled intermittent coronary sinus occlusion appara Pressure-controlled intermittent coronary sinus occlusion appara

1986-01-31

1990-06-19

Kamm, William E.

Surgery

Cardiac augmentation

With condition responsive means

A61B 1900

Patent

active

049349961

ABSTRACT:
The coronary sinus is intermittently occluded by use of means for occluding the sinus, a pressure transducer for sensing the fluid pressure within the sinus and providing corresponding fluid pressure signals, and a controller responsive to the transducer and arranged to provide trigger signals to the occluding means to trigger an occlusion and to interrupt the occlusion, the system being characterized in that the controller is arranged to estimate a plateau level of the fluid pressure during each occlusion and for providing a trigger signal to interrupt each occlusion on the basis of the estimate. The duration of the interruption before the next occlusion is controlled in response to the volume flow in the sinus during the interruption. Pharmacological agents are injected into the sinus during the occlusion, for retroprofusion to the heart tissue. An analysis of heart function is obtained by analyzing the local pressure maxima in successive heartbeats during occlusion. Initiation of the next occlusion is time based on fluid pressure signals taken from the sinus during occlusion. The degree of tissue at risk of infraction (or the amount of infarcted tissue) is estimated based on the fluid pressure signals.

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