Activity Monitoring in Heart Failure Patients With Cardiac Resynchronization Therapy

• Published in: Circulation Journal 2007, Vol.71(12), pp.1885-1892
• Main Authors: Kawabata, Mihoko, Fantoni, Cecilia, Regoli, Francois, Raffa, Santi, Pastori, Francesca, Fratini, Simona, Prentice, John, Klein, Helmut U., Auricchio, Angelo
• Format: Article
• Language: English
• Subjects: Aged; Aging - physiology; Automatic monitoring; Cardiac resynchronization therapy; Diabetes Mellitus - physiopathology; Female; Heart failure; Heart Failure - etiology; Heart Failure - physiopathology; Heart Failure - therapy; Heart Rate - physiology; Humans; Male; Middle Aged; Monitoring, Ambulatory - instrumentation; Motor Activity - physiology; Pacemaker, Artificial; Physical activity; Prospective Studies; Stroke Volume - physiology; Ventricular conduction delay
• ISSN: 1346-9843; 1347-4820
• DOI: 10.1253/circj.71.1885

Background Cardiac resynchronization therapy (CRT) improves functional capacity in heart failure patients. This study aimed to prospectively analyze long-term device-based monitoring of physical activity in patients undergoing CRT. Methods and Results The Activity Log Index (ALI), calculated by CRT devices, represents the percentage of time when acceleration exceeds a threshold and monitors the physical activity. Data from 178 CRT patients (New York Heart Association III 91%, left ventricular ejection fraction 21±6%, left ventricular end-diastolic diameter 69±9 mm, QRS 159±27 ms, sinus rhythm 81%) were retrieved. The ALI increased from a baseline value of 3.6±2.0 to 11.2±4.6 (p