Farklı Fonksiyonel Sınıflardaki Kalp Yetersizliği Hastalarında, Solunum Fonksiyonları, Periferik ve Solunum Kas Kuvveti ve Fonksiyonel Kapasitenin Karşılaştırılması

Abstract

Objective: This cross-sectional, observational study was planned to compare pulmonary function, respiratory and peripheral muscle strength, and functional capacity in different functional classes of heart failure patients. Methods: Thirty-four heart failure patients, in New York Heart Association (NYHA) Class II and III 168.59 +/- 9.84 years, left ventricular ejection fraction (LVEF)=34.24 +/- 7.59%) were included. Class II and Ill patients' pulmonary function was assessed using spirometry, respiratory muscle strength using a mouth pressure device, functional capacity using six minute walk test (6MWT), quadriceps femoris and biceps brachii muscle strength were evaluated using a hand-held dynamometer, and variables were compared. Student t, Chi-square, Mann-Whitney U tests, and Spearman correlation coefficients were used for statistical analysis. Results: There were no statistically significant differences in pulmonary function and respiratory muscle strength between the two groups (p>0.05). The 6MWT distance (328.35 +/- 101.56 m; vs. 480.05 +/- 104.19 m) quadriceps lemons (218.83 +/- 63.62 N; vs. 290.69 +/- 115.53 N) and biceps brachii (164.22 +/- 44.78 N; vs. 219.19 +/- 49.37 N) muscle strength of Class Ill patients were significantly lower than of Class II patients (p<0.05 for all). The NYHA classification system was significantly correlated with measured and predicted 6MWT distance (r=-0.59, r=-0.65, respectively), biceps brachii muscle strength (r=-0.46, r=-0.40, respectively), and % quadriceps femoris muscle strength (r=-0.43) (p<0.05). Conclusion: Functional capacity and peripheral muscle strength decrease as the illness progresses in heart failure. Pulmonary function and respiratory muscle strength are preserved. The NYHA classification system is a reliable method in the detection of changes in functional capacity and peripheral muscle strength. Changes in functional capacity and peripheral muscle strength are consistent with the NYHA classification system. (Anadolu Kardiyol Derg 2011; 11: 101-6)