23.一位未服用乙型阻斷劑的穩定心臟疾病患者，運動測試之最高心率催達最大年齡預期心率的75%，此現象稱為:
(A)inotropic effect
(B)chronotropic incompetence
(C)lusitropic effect
(D)dromotropic incompetence

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統計： A(514), B(1293), C(447), D(439), E(0) #2404569

詳解 (共 4 筆)

#4237217
inotropic effect: 心肌...
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#5587255
當沒有使用乙型阻斷劑的病人無法在測試中達到年齡預估值最大心跳的85%時，就叫作心律變時不全(chronotropic incompetence)，可預測心肌灌流，這會使得共病症及死亡的風險上升。如果心肌灌流不全且心律變時不全，會比單獨異常者預後更差。
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#4218499
交感神經活動增加，正腎上腺素-->...
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#5707944
Inotropes act on your cardiomyocytes, the cells in your heart muscle. Positive inotropic drugs help your heart beat with more force.

Chronotropic incompetence (CI) is generally defined as the inability to increase the heart rate (HR) adequately during exercise to match cardiac output to metabolic demands

Positive dromotropy increases conduction velocity (e.g. epinephrine stimulation), negative dromotropy decreases velocity (e.g. vagal stimulation)

Lusitropy is the rate of myocardial relaxation
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