Exercise Science (운동과학)

korean Society of Exercise Physiology (한국운동생리학회)
권호 표지

Post-Exercise ST Segment Elevation and the Rate-Recovery Loop in Obese and Hyperlipidemic Women

과체중 및 비만 여성에서 운동 후 ST 분절의 상승과 심박수-회복 궤도(Rate-Recovery Loop)의 변화

Go, Seong-Gyeong;Choe, Geon-Sik
고성경;최건식

  • Published : 20040000
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Abstract

Post-Exercise ST Segment Elevation and the Rate-Recovery Loop in Obese and Hyperlipidemic Women. Exercise Science, 13(2): 167-176, 2004. This study investigated post-exercise ST segment elevation and the rate-recovery loop in obese and hyperlipidemic women. The subjects were 25-40 years old and were classified into four groups: Normal Weight (NW, n=12), Overweight-Normal Cholesterol (OWNC, n=12), Overweight-Hypercholesterolemic (OWHC, n=15), and Obese- Hypercholesterolemic (OHC, n=11). During and after treadmill exercise, the ST segment was measured in ECG lead V5. The Rate-RLI (recovery loop index) was the mean ST segment elevation during each heartbeat in the rate-recovery loop. During exercise, the ST segment was depressed. The ST segments in the OWNC, OWHC, and OHC groups were depressed below 100㎶ (1mm), which is considered diagnostic of ischemia. In the same groups, the ST segments differed significantly from the respective resting level in each group at 6-min exercise and submaximum in NW, at submaximum and 1-min recovery in OWNC, at 6-min exercise, submaximum, and 1-min recovery in OWHC, and at submaximum and 1- and 3-min recovery in OHC. The rate-recovery loops were counterclockwise in NW, OWNC, and OWHC, but clockwise in OHC. The Rate-RLI was +335, +467, +354, and +215㎶ in NW, OWNC, OWHC, and OHC, respectively. There was not post-exercise ST segment depression in normal or obese woman, but the ST segment was elevated above the normal level immediately after stopping exercise. The rate-recovery loop of obese women was an intermediate loop, reflecting a higher risk of coronary artery disease than in women of normal weight.

과체중 및 비만 여성에서 운동 후 ST 분절의 상승과 심박수-회복 궤도(Rate-Recovery Loop)의 변화. 운동과학, 제13권 2호, 167-176, 2004. 과체중 및 비만이 운동 및 운동 후 ST 분절의 상승에 미치는 영향과 심박수-회복궤도(Rate-Recovery Loop)를 이용한 관상동맥 질환 위험도를 진단하기 위하여 25-40세의 여성 50명을 대상으로 최대하 운동부하 검사를 실시하였다. 운동부하 검사 시 ST 분절은 V5 유도에서 측정하였다. 연구결과 운동시 ST 분절은 운동 시간에 따라 그 값이 하강하는 경향이 있었으며 특히 과체중Ⅰ,Ⅱ군과 비만군의 ST 분절이 100㎶ 이하로 하강하였다. 동일집단에서 안정 시 ST 분절에 비해 정상체중군은 6분과 최대하 운동시의 값이 유의하게 낮았으며, 과체중 Ⅰ군은 최대하 운동과 회복 1분의 값이 유의하게 차이가 있었다. 과체중 Ⅱ군은 6분과 최대하 운동 및 회복 1분의 ST 분절이 안정 시에 비해 차이가 있었으며, 비만군도 최대하 운동과 회복 1,3분의 값이 안정 시에 비해 유의한 차이가 있었다. 운동 직후 ST 분절은 4개 집단 모두 안정 시 값 이상으로 상승하였다. 운동 후 심박수-회복 궤도는 정상체중군과 과체중 Ⅰ,Ⅱ군의 경우 반시계 방향으로 회전하였으나, 비만군은 시계방향으로 변하였다. 심박수-회복궤도지수는 정상체중군이 +335㎶였으며, 과체중Ⅰ군은 +467㎶, 과체중Ⅱ군은 +354㎶, 비만군은 +215㎶로서 과체중Ⅰ군이 가장 높고 비만군이 가장 낮았다. 연구 결과를 종합할 때 정상체중, 과체중 및 비만 여성은 최대하운동 직후에 ST 분절이 상승하는 것으로 보이며, 심박수-회복 궤도로 판단할 때 비만군은 정상체중군보다 관상동맥 질환에 대한 위험도가 더 높다는 것이 확인되었다.

Keywords

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