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  • Title: The regression of left ventricular hypertrophy by imidapril and the reduction of serum procollagen type III amino-terminal peptide in hypertensive patients.
    Author: Sasaguri M, Noda K, Tashiro E, Notomo J, Tsuji E, Koga M, Arakawa K.
    Journal: Hypertens Res; 2000 Jul; 23(4):317-22. PubMed ID: 10912767.
    Abstract:
    Angiotensin-converting enzyme (ACE) inhibitors are known to be the most effective antihypertensive drugs for reducing left ventricular mass in hypertensives when compared to other classes of drugs. In the present study, we evaluated the effects of imidapril, an ACE inhibitor, on serum procollagen type III amino-terminal peptide (PIIIP) levels as well as the left ventricular mass index (LVMI). The subjects consisted of 15 patients (12 men and 3 women) in the outpatient clinic of our hospital who were diagnosed as essential hypertensives and who had not been treated with any antihypertensive medication prior to the study. Left ventricular hypertrophy was observed in all of the patients, ie., LVMI >110 g/m2 in men and >106 g/m2 in women. Blood pressure, LVMI, and serum PIIIP levels were measured before and after treatment with imidapril for 6 months. The starting dose of imidapril was 5 mg, and this was increased to 10 mg. Finally, 1 mg of trichlormethiazide was added to obtain adequate control of blood pressure. Blood pressure significantly decreased in 12 patients, and the mean LVMI decreased significantly from 153.1 +/- 9.0 to 135.4 +/- 6.3 (p< 0.01) after treatment. The changes in LVMI and PIIIP levels with treatment had significant correlation (r=0.639, p< 0.05). The present study showed that imidapril reduces the left ventricular mass in hypertensives after 6 months of treatment, and that this may at least in part be due to a decrease in the collagen content of the hypertrophied heart, suggesting that serum PIIIP levels are a useful marker of the regression of left ventricular hypertrophy.
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