Overweight and its association with aortic pressure wave reflection after exercise

Chi Young Shim, Woo In Yang, Sungha Park, Min Kyung Kang, Young Guk Ko, Donghoon Choi, Yangsoo Jang, Namsik Chung, Jong Won Ha

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

BackgroundObesity is associated with arterial stiffening, left ventricular (LV) hypertrophy, and diastolic dysfunction. However, there is no data regarding dynamic changes in arterial hemodynamics with exercise in overweight subjects. We hypothesized that overweight women would show a different exercise response in wave reflection compared with lean women.MethodsA total of 59 overweight and 68 lean nondiabetic women (mean age 63 7 years) underwent symptom-limited supine bicycle exercise testing with simultaneous two-dimensional and Doppler echocardiography. Central hemodynamics including central aortic pressure and augmentation index (AIx) were obtained at rest and immediately after peak exercise using radial artery tonometry.ResultsOverweight women showed a higher LV mass index (lean vs. overweight; 40.2±10.2 vs. 45.3±11.0g/m 2.7, P = 0.007) and a lower early diastolic mitral annular velocity (6.3 1.8 vs. 5.5±1.6 cm/s, P = 0.013) than lean women. Although the two groups did not differ in peripheral and central hemodynamics including AIx (36.3±11.7 vs. 36.8±10.2%, P = 0.830) and AIx normalized for heart rate 75/min (AIx@75, 30.4±11.5 vs. 30.1±9.9%, P = 0.885) at rest, AIx (20.9±11.5 vs. 27.6±10.4%, P = 0.004) and AIx@75 (25.8±10.2 vs. 31.6±7.7%, P = 0.002) at peak exercise were significantly higher in overweight women. In simple correlation analysis, body mass index (BMI) showed significant correlations with AIx, and AIx@75 at peak exercise, whereas no relationships were found with those parameters at rest. Multiple regression analysis showed that BMI was an independent determinant of AIx@75 at peak exercise (Β = 0.28, P = 0.004).ConclusionsDespite similar resting peripheral and central hemodynamics, the wave reflection in overweight women after exercise differed from that in lean women. These findings suggest that being overweight is related to higher wave reflection after exercise.

Original languageEnglish
Pages (from-to)1136-1142
Number of pages7
JournalAmerican journal of hypertension
Volume24
Issue number10
DOIs
Publication statusPublished - 2011 Oct

All Science Journal Classification (ASJC) codes

  • Internal Medicine

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