Background. Patients with prosthesis-patient mismatch (PPM) continue to show some degrees of left ventricular hypertrophy after aortic valve replacement for aortic stenosis. The renin-angiotensin system plays a major role in promoting and sustaining hypertrophy. In a controlled, randomized study, we tested the hypothesis that the combination of angiotensin-converting enzyme inhibitors (ACEi) plus angiotensin II receptor blocker (ARB) can be more effective in decreasing hypertrophy than a largely employed association such as ACEi plus beta-blockers in PPM patients. Methods. We enrolled a total of 72 patients with aortic valve replacement and evidence of PPM (effective orifice area <0.85 cm(2)/m(2)) at postoperative echocardiography. At discharge, they were randomly assigned to ramipril plus candesartan (n = 36) or ramipril plus metoprolol (n = 36). Results. At baseline, age, 24-hour blood pressure, left ventricular measurements, and transprosthetic gradients were similar between the two groups. After 12 months, the extent of 24-hour systolic and diastolic blood pressure decrease was similar between the two groups (-13.3% and 16.3% versus -12.3% and 15.8%, respectively; p = 0.7 and 0.8, respectively). Left ventricular mass index significantly decreased in both groups (ACEi plus ARB 165 +/- 19 g/m(2) to 117 +/- 17 g/m(2); p < 0.0001; ACEi plus beta-blockers 161 +/- 15 g/m(2) to 128 +/- 20 g/m(2); p < 0.0001). However, patients receiving ACEi plus ARB had a higher decrease of left ventricular mass (-46 +/- 15 g/m(2) versus -35 +/- 12 g/m(2); p = 0.001) and a lower rate of residual left ventricular hypertrophy (22% versus 47%; p = 0.04). Conclusions. This study shows that in patients with PPM, the association ACEi and ARB has a greater anti-remodeling effect compared with ACEi and beta-blockers, and is independent of blood pressure. (Ann Thorac Surg 2010;90:1899-903) (C) 2010 by The Society of Thoracic Surgeons

Dual Renin-Angiotensin System Blockade for Patients With Prosthesis-Patient Mismatch / Benedetto, Umberto; Giovanni, Melina; Refice, Simone; DI BARTOLOMEO, Roberta; Antonino, Roscitano; Angeloni, Emiliano; Sinatra, Riccardo. - In: ANNALS OF THORACIC SURGERY. - ISSN 0003-4975. - 90:6(2010), pp. 1899-1903. ((Intervento presentato al convegno 46th Annual Meeting of the Society-of-Thoracic-Surgeons tenutosi a Ft Lauderdale, FL nel JAN 24-27, 2010 [10.1016/j.athoracsur.2010.08.023].

Dual Renin-Angiotensin System Blockade for Patients With Prosthesis-Patient Mismatch

BENEDETTO, UMBERTO;Giovanni Melina;REFICE, SIMONE;DI BARTOLOMEO, ROBERTA;ANGELONI, EMILIANO;SINATRA, Riccardo
2010

Abstract

Background. Patients with prosthesis-patient mismatch (PPM) continue to show some degrees of left ventricular hypertrophy after aortic valve replacement for aortic stenosis. The renin-angiotensin system plays a major role in promoting and sustaining hypertrophy. In a controlled, randomized study, we tested the hypothesis that the combination of angiotensin-converting enzyme inhibitors (ACEi) plus angiotensin II receptor blocker (ARB) can be more effective in decreasing hypertrophy than a largely employed association such as ACEi plus beta-blockers in PPM patients. Methods. We enrolled a total of 72 patients with aortic valve replacement and evidence of PPM (effective orifice area <0.85 cm(2)/m(2)) at postoperative echocardiography. At discharge, they were randomly assigned to ramipril plus candesartan (n = 36) or ramipril plus metoprolol (n = 36). Results. At baseline, age, 24-hour blood pressure, left ventricular measurements, and transprosthetic gradients were similar between the two groups. After 12 months, the extent of 24-hour systolic and diastolic blood pressure decrease was similar between the two groups (-13.3% and 16.3% versus -12.3% and 15.8%, respectively; p = 0.7 and 0.8, respectively). Left ventricular mass index significantly decreased in both groups (ACEi plus ARB 165 +/- 19 g/m(2) to 117 +/- 17 g/m(2); p < 0.0001; ACEi plus beta-blockers 161 +/- 15 g/m(2) to 128 +/- 20 g/m(2); p < 0.0001). However, patients receiving ACEi plus ARB had a higher decrease of left ventricular mass (-46 +/- 15 g/m(2) versus -35 +/- 12 g/m(2); p = 0.001) and a lower rate of residual left ventricular hypertrophy (22% versus 47%; p = 0.04). Conclusions. This study shows that in patients with PPM, the association ACEi and ARB has a greater anti-remodeling effect compared with ACEi and beta-blockers, and is independent of blood pressure. (Ann Thorac Surg 2010;90:1899-903) (C) 2010 by The Society of Thoracic Surgeons
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/382059
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