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Indian Pacing Electrophysiol J. 2009 May 15;9(3):158-66.

Nebivolol and quinapril reduce p-wave duration and dispersion in hypertensive patients.

Indian pacing and electrophysiology journal

Hasan Korkmaz, Orhan Onalan, Mehmet Akbulut, Yilmaz Ozbay

Affiliations

  1. Department of Cardiology, Elazig Education and Research Hospital, Elazig, Turkey. [email protected]

PMID: 19471593 PMCID: PMC2683636

Abstract

We aimed to investigate the effects of nebivolol and quinapril treatments on P-wave duration and dispersion in hypertensive patients. Hypertensive patients who were in sinus rhythm were assigned to the two treatment groups and received either 20 mg quinapril/day or 5 mg nebivolol/day. P-Wave dispersion (PWD) was measured at baseline and after four weeks of treatment and defined as the difference between the maximum (Pmax) and the minimum (Pmin) P-wave duration. The study group consisted of 54 patients (Mean age: 53 +/- 9 years, 46% women) with 27 patients in each group. At 4-week follow up both treatment groups showed a significant reduction (p< 0.001) in systolic (SBP) and diastolic blood pressure (DBP). Heart rate (HR) reduction was significant in patients receiving nebivolol (P=0.001). Both groups showed a similar (P=0.413 for PWD, p=0.651 for Pmax) but significant reduction in PWD (nebivolol: -16+/- 14, P< 0.0001 and quinapril: -13+/- 11, P< 0.0001) and Pmax (nebivolol: -10+/- 11, P=0.001 and quinapril: -9+/- 11, P=0.001). A 2 (Time) x 2 (Group) mixed-model repeated-measures analysis of variance revealed that the main effect of Time was significant for Pmax (P=0.002) and PWD (P=0.008) after controlling for changes in SBP, DBP and HR. However, the main effect of Group and Time x Group interaction was not significant for both variables (All p values > 0.05). In conclusion, short-term treatment with nebivolol and quinapril produces a similar but significant reduction in Pmax and PWD in hypertensive patients. This effect is independent of blood pressure and heart rate changes.

Keywords: Hypertension; Nebivolol; P-wave duration; Quinapril

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