TY - JOUR
T1 - Impaired heart rate recovery and chronotropic incompetence in patients with heart failure with preserved ejection fraction.
AU - Phan, TT
AU - Shivu, GN
AU - Abozguia, Khalid
AU - Davies, C
AU - Nassimizadeh, M
AU - Jimenez, Donie-Jr
AU - Weaver, Rebekah
AU - Ahmed, Ibrar
AU - Frenneaux, Michael
PY - 2010/1/1
Y1 - 2010/1/1
N2 - BACKGROUND
This study assessed the chronotropic response to exercise and heart rate (HR) recovery after exercise in a carefully phenotyped group of patients with heart failure with preserved left ventricular ejection fraction (HfpEF) and a control group of similar age and gender distribution.
METHODS AND RESULTS
We studied 41 patients with HfpEF, 41 healthy controls, and 16 hypertensive controls. None were taking HR-limiting medications. All study participants had clinical examination, 12-lead ECG, pulmonary function test, echocardiogram, and metabolic exercise test with HR monitoring throughout exercise. Chronotropic response was measured by the percentage of the HR reserve used during maximal exercise and the peak exercise HR as a percentage of predicted maximal HR. Patients with HfpEF were generally women (70%), overweight, aged 69+/-8 years. Controls were of similar gender (63%) and age (67+/-6 years). Patients with HfpEF had significantly reduced peak VO(2) compared with controls (20+/-4 mL kg(-1) min(-1) versus 31+/-6 mL kg(-1) min(-1), P
AB - BACKGROUND
This study assessed the chronotropic response to exercise and heart rate (HR) recovery after exercise in a carefully phenotyped group of patients with heart failure with preserved left ventricular ejection fraction (HfpEF) and a control group of similar age and gender distribution.
METHODS AND RESULTS
We studied 41 patients with HfpEF, 41 healthy controls, and 16 hypertensive controls. None were taking HR-limiting medications. All study participants had clinical examination, 12-lead ECG, pulmonary function test, echocardiogram, and metabolic exercise test with HR monitoring throughout exercise. Chronotropic response was measured by the percentage of the HR reserve used during maximal exercise and the peak exercise HR as a percentage of predicted maximal HR. Patients with HfpEF were generally women (70%), overweight, aged 69+/-8 years. Controls were of similar gender (63%) and age (67+/-6 years). Patients with HfpEF had significantly reduced peak VO(2) compared with controls (20+/-4 mL kg(-1) min(-1) versus 31+/-6 mL kg(-1) min(-1), P
U2 - 10.1161/CIRCHEARTFAILURE.109.877720
DO - 10.1161/CIRCHEARTFAILURE.109.877720
M3 - Article
C2 - 19917649
SN - 1941-3297
VL - 3
SP - 29
EP - 34
JO - Circulation. Heart failure
JF - Circulation. Heart failure
IS - 1
ER -