SYSTEMS AND METHODS FOR DETECTING ATRIAL TACHYARRHYTHMIA USING HEART SOUNDS

摘要

Systems and methods for detecting atrial tachyarrhythmias (AT) such as atrial fibrillation (AF) are disclosed. A medical system can include a cardiac signal sensor circuit to sense a cardiac electrical signal and a heart sound (HS) sensor to sense heart a HS signal. A cardiac electrical signal metric, including a cycle length variability or a detection of atrial electrical activity, can be generated from the cardiac electrical signal. A HS metric can be generated from the HS signal, including a status of detection of S4 heart sound or a S4 heart sound intensity indicator. The system can include an AT detector circuit that can detect an AT event, such as an AF event, using the cardiac electrical signal metric and the HS metric. The system can additionally classify the detected AT event as an AF or an atrial flutter event.

主权项

1. A system, comprising:
a first sensor circuit, including a sense amplifier circuit to sense a cardiac electrical signal of a patient; a second sensor circuit, including a sense amplifier circuit to sense a heart sound (HS) signal of the patient; a memory circuit; a first signal metric generator circuit, coupled to the first sensor circuit and the memory circuit to detect from the cardiac electrical signal at least one signal component, and generate a cardiac electrical signal metric using the at least one signal component, the cardiac electrical signal metric stored in the memory circuit and indicative or correlative of atrial electrical activity; a second signal metric generator circuit, coupled to the second signal sensor circuit and the memory circuit to detect from the HS signal at least one HS component including S4 heart sound, and generate a HS metric using the at least one HS component, the HS metric stored in the memory circuit and indicative or correlative of atrial mechanical contraction; and an atrial tachyarrhythmia (AT) detector circuit, communicatively coupled to the first and second signal metric generator circuits, configured to detect an AT event using the cardiac electrical signal metric and the HS metric.