[Reduced cardiopulmonary exercise capacity in patients with essential hypertension: impact of left ventricular hypertrophy].
OBJECTIVE
To evaluate the cardiopulmonary exercise capacity in patients with essential hypertension (EH) complicating with or without left ventricular hypertrophy (LVH).


METHODS
Graded maximal exercise test on the bicycle ergometer with respiratory gas analysis were performed in 30 gender and age matched normotensive controls, 40 EH patients without LVH and 30 EH patients with LVH (LVMI>125 g/m2 in males and > 120 g/m2 in females). Metabolic equivalents (METs), oxygen uptake (VO2), oxygen uptake to body mass ratio (VO2/kg) and oxygen uptake to heart beat ratio (VO2/HR) at time of reaching anaerobic threshold (AT) and at maximal oxygen uptake (VO2max) were measured and compared.


RESULTS
METs and VO2/kg were significantly reduced in EH patients with or without LVH compared with controls [at AT, METs: 3.57 +/- 0.8 and 4.34 +/- 1.47 vs. 5.21 +/- 1.45; VO2/kg: 12.38 +/- 2.85 and 14.42 +/- 4.33 vs. 18.48 +/- 4.52, all P < 0.01; at VO2max, METs: 4.94 +/- 1.24 and 5.90 +/- 1.51 vs. 6.96 +/- 1.85; VO(2)/kg: (17.20 +/- 4.34) mlxmin(-1)xkg(-1) and (20.41 +/- 4.59) mlxmin(-1)xkg(-1) vs. (24.04 +/- 5.21) mlxmin(-1)xkg(-1), all P < 0.01]. METs and VO2/kg at both time points were also significantly reduced in EH patients with LVH compared EH patients without LVH (all P < 0.05). The lower VO2/kg in hypertensive patients was significantly correlated to higher LVMI (P < 0.05).


CONCLUSIONS
Cardiopulmonary exercise capacity was reduced in hypertensive patients, especially in hypertensive patients with LVH.
Fu
Lu-hong
LH
Department of Cardiology, Zhejiang Jinhua Guangfu Hospital, Jinhua 321000, China.
Ye
Ping-xian
PX
Sun
Zhi-ling
ZL
Xiang
Yan-fang
YF
Zhu
Xian-zhong
XZ
D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D005080:Exercise Test; D017079:Exercise Tolerance; D005260:Female; D006321:Heart / Q000503:physiopathology; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*; D017379:Hypertrophy, Left Ventricular / Q000503:physiopathology*; D008168:Lung / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D012129:Respiratory Function Tests