14 一位 30 歲年輕男性休息時心跳為 70 bpm，收縮壓為 130 mmHg，舒張壓為 80 mmHg，則其心肌攝氧 量（myocardial oxygen consumption）的指標為：
(A) 35×10²
(B) 56×10²
(C) 91×10²
(D) 147×10²

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統計： A(15), B(22), C(92), D(6), E(0) #1095783

詳解 (共 2 筆)

#4679094
心肌攝氧量：HR*SPB*1/10070...
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吳英黛 p. 46 ，心肌攝氧量(=HR*SBP)

正常人是 10ml/min/100g

70*130*1/100=91


102尚未知，再請大家解答

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Myocardial oxygen consumption (MVO2) is defined by the equation:

MVO2 = coronary blood flow x arteriovenous difference in O2 content,

The average value for a heart of 300 g is 30 to 35 ml/min.1

因RPP和MVO2具關聯性，為方便計算臨床多用RPP顯示

The rate-pressure product (RPP) was calculated as the product of heart rate and systolic arterial pressure for both baseline and maximum measures2


*RPP & MVO2 關聯性各有立場，但證據層級都不太高年代也久遠，但至少課本上表示肯定他的關聯性，國外相關醫院相關網站也是說 clinical use 


Ref.:

1. Delaye, J., Mpetshi, I., & Durand, J. P. (1983). Les besoins en oxygène du myocarde [Oxygen requirements of the myocardium]. Archives des maladies du coeur et des vaisseaux, 76 Spec No, 7–12.

2. Yasuhiro Kodama, Mitsuhiro Yokota, Takashi Miyahara, Tatsuyuki Matsunami, Toshikazu Sobue, Hidehiko Saito, Effect of antianginal agents on the relationship between rate-pressure product and myocardial oxygen uptake, American Heart Journal, Volume 126, Issue 3, Part 1, 1993, Pages 587-593, ISSN 0002-8703,

3. Kal, J. E., Van Wezel, H. B., & Vergroesen, I. (1999). A critical appraisal of the rate pressure product as index of myocardial oxygen consumption for the study of metabolic coronary flow regulation. International journal of cardiology, 71(2), 141–148. https://doi.org/10.1016/s0167-5273(99)00141-2

 

 


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