Feasibility of Heart Sounds Measurements from an Accelerometer within an ICD Pulse Generator
| Autor: | Abhilash Patangay, Pramodsingh H. Thakur, Krzysztof Z. Siejko, Maria-Teresa Olivari, Keith R. Maile |
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| Rok vydání: | 2012 |
| Předmět: |
medicine.medical_specialty
business.industry medicine.medical_treatment Pulse generator General Medicine medicine.disease Implantable cardioverter-defibrillator Accelerometer Internal medicine Heart failure Heart sounds Skin surface medicine Cardiology Decompensation Implant Cardiology and Cardiovascular Medicine business |
| Zdroj: | Pacing and Clinical Electrophysiology. 36:334-346 |
| ISSN: | 0147-8389 |
| Popis: | Objective The feasibility of detecting heart sounds (HS) from an accelerometer sensor enclosed within an implantable cardioverter defibrillator (ICD) pulse generator (PG) was explored in a noninvasive pilot study on heart failure (HF) patients with audible third HS (S3). Methods Accelerometer circuitry enhanced for HS was incorporated into non-functional ICDs. A study was conducted on 30 HF patients and 10 normal subjects without history of cardiac disease. The devices were taped to the skin surface over both left and right pectoral regions to simulate subcutaneous implants. A lightweight reference accelerometer was taped over the cardiac apex. Waveforms were recorded simultaneously with a surface electrocardiogram for 2 minutes. Algorithms were developed to perform off-line automatic detection of HS and HS time intervals (HSTIs). Results S1, S2, and S3 vibrations were detected in all accelerometer locations for all 40 subjects, including 16 subjects without an audible S3. A substantial proportion of S3 energy was infrasonic ( |
| Databáze: | OpenAIRE |
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