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The effect of combination therapy on regression of left ventricular hypertrophy in cases with hypertension
Bahar Boydak1, Sanem Nalbantgil, Hasan Yilmaz
1Department of Emergency Cardiology, Faculty of Medicine, Ege University, 1780/2 sokak, No. 9 D. 1, 35530 Karsiyaka, Izmir, Turkey. boydak@med.ege.edu.tr
Insights
Angiotensin-converting enzyme inhibitor (ACE-I) plus calcium channel blocker combination therapy shows superior regression of left ventricular hypertrophy (LVH) compared to ACE-I plus diuretic in hypertensive patients. Both combinations effectively lower blood pressure.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Antihypertensive drugs exhibit varying effects on left ventricular hypertrophy (LVH) regression.
- Limited comparative data exist on combination therapies for LVH regression in hypertension.
Purpose of the Study:
- To compare the efficacy of two antihypertensive combination therapies in regressing left ventricular hypertrophy (LVH).
- To evaluate ACE-I plus calcium channel blocker versus ACE-I plus diuretic in patients with uncontrolled hypertension on ACE-I monotherapy.
Main Methods:
- A 6-month randomized study involving 40 hypertensive patients.
- Group 1: Lisinopril (ACE-I) + Nifedipine (calcium channel blocker).
- Group 2: Lisinopril (ACE-I) + Hydrochlorothiazide (diuretic).
- Blood pressure, echocardiography, and laboratory analyses were performed pre- and post-treatment.
Main Results:
- Both combination therapies significantly reduced systolic and diastolic blood pressure.
- Left ventricular mass index (LVMI) decreased significantly in both groups.
- A greater reduction in LVMI was observed in the ACE-I plus calcium channel blocker group.
Conclusions:
- ACE-I plus calcium channel blocker and ACE-I plus diuretic combinations offer similar blood pressure control.
- ACE-I plus calcium channel blocker combination therapy demonstrates superior efficacy in regressing LVH compared to ACE-I plus diuretic.
Objective:
Up to this date, it is well shown that several antihypertensive drugs have different regressive effect on left ventricular hypertrophy (LVH). However, there are different studies regarding the effect of antihypertensive combination therapies on regression of LVH. In this study, 2 different combinations ACE-I plus calcium channel blocker and ACE-I plus diuretic were compared in cases with hypertension whose BPs were not controlled by ACE-I alone.
Methods:
Forty patients with mild to moderate hypertension were included in this study. The treatment was continued for 6 months in the Faculty of Medicine at Ege University, Turkey, between January and December 2003. Adequate response with lisinopril 20 mg/daily failed to be achieved in all patients. Patients divided into 2 groups. There were no differences between the groups in patients' age, blood pressure (BP) and other clinical and laboratory range. First group patients received lisinopril 20 mg + nifedipine GITS 30 mg and second group patients received lisinopril 20 mg + hydrochlorothiazide 25 mg. The treatment was continued for 6 months. Blood pressure were measured every 2 weeks, echocardiographic findings, and blood and urinary analysis were performed before and at the end of treatment.
Results:
Systolic and diastolic BP decreased significantly in both groups and no significant difference regarding BP was found between the 2 groups. Left ventricular mass index also decreased significantly in both groups. However, in the first group left ventricular mass index decreased more compared to the second group.
Conclusion:
The effect of combination therapies with angiotensin converting enzyme inhibitor (ACE-I) plus diuretic and ACE-I plus calcium channel blocker on systolic and diastolic BP are similar. However, when LVH is present, regressive effect of the combination of ACE-I plus calcium channel blocker is superior to the combination of ACE-I plus diuretic.
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