Patients with a hypertensive response to exercise have impaired systolic function without diastolic dysfunction or left ventricular hypertrophy.
OBJECTIVE
We sought to determine if a hypertensive response to exercise (HRE) is associated with myocardial changes consistent with early hypertensive heart disease.


BACKGROUND
An HRE predicts the development of chronic hypertension (HT) and may reflect a preclinical stage of HT.


METHODS
Patients with a normal left ventricular (LV) ejection fraction and a negative stress test were recruited into three matched groups: 41 patients (age 56 +/- 10 years) with HRE (>210/105 mm Hg in men; >190/105 in women), comprising 22 patients with (HT+) and 19 without resting hypertension (HT-); and 17 matched control subjects without HRE. Long-axis function was determined by measurement of the strain rate (SR), peak systolic strain, and cyclic variation (CV) of integrated backscatter in three apical views.


RESULTS
An HRE was not associated with significant differences in LV mass index. Exercise performance and diastolic function were reduced in HRE(HT+) patients, but similar in HRE(HT-) patients and controls. Systolic dysfunction (peak systolic strain, SR, and CV) was significantly reduced in HRE patients (p < 0.001 for all). These reductions were equally apparent in patients with and without a history of resting HT (p = NS) and were independent of LV mass index and blood pressure (p < 0.01).


CONCLUSIONS
An HRE is associated with subtle systolic dysfunction, even in the absence of resting HT. These changes occur before the development of LV hypertrophy or detectable diastolic dysfunction and likely represent early hypertensive heart disease.
University of Queensland, Brisbane, Australia.
Philip M
PM
Mottram
Brian
B
Haluska
Satoshi
S
Yuda
Rodel
R
Leano
Thomas H
TH
Marwick
D015444:Exercise; D005260:Female; D006801:Humans; D006973:Hypertension / Q000209:etiology*; D017379:Hypertrophy, Left Ventricular / Q000150:complications* / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction