Objective In patients with hypertension, regression of left ventricular hypertrophy (LVH) is associated with improved prognosis. Impact of exaggerated blood pressure response to exercise (Ex-BP) seen in patients with hypertension undergoing antihypertensive therapy on the regression of LVH has not been evaluated. This prospective study investigated the relationship between Ex-BP on antihypertensive therapy and the regression of LVH.

Methods We prospectively studied 124 never-treated patients with hypertension with LVH. After a pretreatment evaluation, antihypertensive treatment was started and exercise test was performed in all patients. Patients with Ex-BP were divided into the Ex-BP (+) group and those without were divided into the Ex-BP (−) group. Regression of LVH over the follow-up period was compared between the groups.

Results The follow-up duration was approximately 12 months in both the groups. Mean values of blood pressure at rest during the follow-up period were similar between the groups. Reduction of LVH was seen in both the groups. The magnitude of reduction of LVH was significantly smaller in the Ex-BP (+) group compared with the Ex-BP (−) group. Regression of LVH was much frequently seen in the Ex-BP (+) group compared with the Ex-BP (−) group. Multiple regression analysis determined that on-treatment Ex-BP was an independent negative determinant of antihypertensive treatment-induced reduction of LVH.

Conclusions This study suggests that on-treatment Ex-BP is associated with depressed regression of LVH in patients with hypertension with antihypertensive treatment. If Ex-BP is detected despite receiving antihypertensive agents, improvement of Ex-BP may be necessary to achieve an effective reduction of LVH. Active search of Ex-BP is recommended in patients with hypertension with antihypertensive treatment.