A high speed digital telemetry system (10) includes a transmitter (12) and a receiver (14), at least one of which is adapted for use in an implantable device. The transmitter includes a data encoder (14), modulator (16), transmitting coil (20), and transmitting coil drive circuit (18). The data enco ...
An atrial rate based programmable pacemaker including means for preventing the heart from being paced at an upper rate limit for prolonged periods of time is disclosed which paces the heart at a rate that follows or tracks the atrial rate up to the upper rate limit of the pacemaker, at which point t ...
A system and method are provided for modulating the base rate of a transfer function for a rate-responsive cardiac pacemaker. Activity sensor measurements are used to derive activity variance measurements, which in turn are used to modulate the base pacing rate. In one embodiment, a histogram is use ...
A rate-responsive pacemaker which includes a conventional programmable pulse generator, a physiological sensor, and a processor is disclosed which generates heart stimulation pulses on demand, or as otherwise programmed, as controlled by a rate control signal which is derived from the physiological ...
An improved telemetry system for telemetering data from an implantable device such as a heart pacemaker to an external device with minimum energy consumption. The external device first sweeps its receiver across a predetermined frequency band, e.g., the fm broadcast band of 88 MHz to 108 MHz, to det ...
A method and system for positioning a defibrillation electrode within the pericardial space of a mammal is disclosed which includes means for distending the pericardium from the heart by injecting a small volume of fluid into the pericardium. A needle having a lumen therethrough is inserted from a s ...
An autocapture system within an implantable pulse generator automatically maintains the energy of a stimulation pulse at a level just above that which is needed to effectuate capture. The electrical post-stimulus signal of the heart following delivery of a stimulation pulse is compared to a polariza ...
The present invention is directed toward a pulse generator for detecting that a pulse generator and an implantable lead are properly implanted so that a plurality of automatic features can be automatically turned ON. The automatic features include: automatic sensitivity adjustment; automatic capture ...
An implantable pacemaker having a unipolar/bipolar lead interchangeability includes lead impedance measuring capability for automatically measuring lead impedance, initiated by the occurrence of predetermined events, such as whenever a programming change is made, whenever capture fails to occur in r ...
A system and method for a pacemaker are provided, for using cardiac wall motion sensor signals to provide hemodynamically optimal pacing therapy to patient at rest, and for providing rate-responsive pacing therapy. The cardiac wall motion sensor signals are provided by an implantable lead that incor ...
