what are the upper limits of normal for the qtc
QT interval Definitions of normal QTc vary from being equal to or less than 0.40 s (≤400 ms),[9] 0.41s (≤410ms),[10] 0.42s (≤420ms)[11] or 0.44s (≤440ms).[12] For risk of sudden cardiac death, "borderline QTc" in males is 431–450 ms; and, in females, 451–470 ms. An "abnormal" QTc in males is a QTc above 450 ms; and, in females, above 470 ms.[13]
Rate equation k is the first order rate constant, which has units of 1/s or sâˆ’1.
Pulse Pressure waves generated by the heart in systole move the arterial walls. Forward movement of blood occurs when the boundaries are pliable and compliant. These properties form enough to create a palpable pressure wave.
Marcus Álvarez