Journals / Türk Kardiyoloji Derneği Arşivi / 2002 / Cilt: 30 - Sayı: 11
Restoring sinus rhythm in patients with atrial fibrilation improves excessive cardiovascular response to isometric and isotonic exercises
- Pages
- 675–680
- DOI
- —
Abstract
The aim of our study was to compare the tolerance to isometric and isotonic exercises by determining if an improvement would exist, or not, in the cardiovascular response to these exercises after reverting to sinus rhythm in patients with atrial fibrillation. Twenty seven cases with nonvalvular chronic (having periods ranging between 48 hrs and 1 year) atrial fibrillation, 14 female and 13 male (mean age 63.10 ± 11.85 years) were included in the study. Sinus rhythm could not be restored in two cases. The investigation was carried on the remaining 25 cases. Isometric and isotonic exercise tests were performed with all of the patients before and 48 hours after the rhythm was reverted to sinus. Isometric exercise test was performed by handgrip test, and isotonic exercise test was performed immediately after the isometric exercise test by using modified Bruce protocol, limited by symptoms. The electrocardiograms were recorded, and heart rates and blood pressures were measured at rest, at each stage of the exercise, at maximum effort and at every minute of the recovery period. Repeated measures of ANOVA test and linear regression test were used for statistical evaluations. Heart rate at rest was significantly low after reverting rhythm to sinus at isometric exercise (p=0.0001). This decrease continued to be significant at the 1st, 2nd and 3rd minutes of the test (p=0.0014, p=0.0002 and p
Özet
Atriyal fibrilasyonlu (AF) hastalarda eforla çabuk yorulma ve çarpıntı yakınmaları daha sıktır. Sağlıklı kişilerde, egzersizle ortaya çıkan sempatik aktivitedeki artışa bağlı olarak kalp hızının ve sistolik arter basıncının arttığı bilinmektedir. Çalışmamızın amacı, AF'lu hastalarda ritm sinüse döndürüldükten sonra izotonik ve izometrik egzersize kardiyovasküler yanıttaki düzelmeyi saptayarak izotonik ve izometrik egzersiz toleranslarını karşılaştırmaktı. Çalışmaya valvüler olmayan kronik AF'lu (AF süresi >48 saat-