title: Direct comparison of a contractility and activity pacemaker sensor during treadmill exercise testing.
abstract: There are limited data about the chronotropic capacity of the peak endocardial acceleration (PEA) sensor. This study directly compared the chronotropic function from the PEA and the activity (ACT) sensor. The study included 18 patients (age 73 +/- 7 years) with > or = 75% pacemaker-driven heart rate (HR) and a PEA sensor and 11 healthy controls (age 67 +/- 7 years) underwent a chronotropic assessment exercise protocol (CAEP) exercise test with the pacemaker patients in VVIR mode after programming the sensors in the default setting with adjustment of the upper sensor rate as an age related maximum value (220-age). The ACT sensor was externally strapped on the thorax. Achieved exercise duration for the patients and controls was, respectively, 9.2 +/- 3 vs 18.4 +/- 4 minutes (P <0.001). The maximal achieved HR with the PEA sensor was 124 +/- 25 beats/min, versus the ACT with 140 +/- 23, versus the controls with 153 +/- 26 beats/min (P <0.001 between the groups). For the PEA, ACT, and controls, the time to peak HR was, respectively, 11 +/- 3, 7 +/- 3.6, and 18 +/- 4 (P <0.001 between groups) and HR after 10 minutes recovery was, respectively, 80 +/- 20, 65 +/- 15, and 82 +/- 4 beats/min (P <0.001 between groups). The PEA sensor functions hypochonotroop during exercise programmed as a single sensor system. It is, therefore, preferable to combine the PEA sensor with an activity-based sensor in a dual sensor system. Although both groups had normal left ventricular functions, the exercise capacity of pacemaker patients is significantly lower than in the controls.
authors.affiliation: Department of Clinical and Experimental Cardiology, Academic Medical Center, Hospital Goes Amsterdam, the Netherlands. a.yilmaz@amc.uva.nl
authors.forename: Ayten
authors.initials: A
authors.lastname: Erol-Yilmaz
authors.forename: Raymond
authors.initials: R
authors.lastname: Tukkie
authors.forename: Job
authors.initials: J
authors.lastname: De Boo
authors.forename: Tim
authors.initials: T
authors.lastname: Schrama
authors.forename: Arthur
authors.initials: A
authors.lastname: Wilde
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000628:therapy; D016022:Case-Control Studies; D005080:Exercise Test; D017079:Exercise Tolerance; D005260:Female; D006327:Heart Block / Q000628:therapy; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male; D009200:Myocardial Contraction / Q000502:physiology*; D010138:Pacemaker, Artificial; D012146:Rest; D012804:Sick Sinus Syndrome / Q000628:therapy; D016683:Supine Position; D013997:Time Factors