Why
might a condition such as cardiac hypertrophy(growth of the heart)
change the mean frontal axis of...
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Medical Sciences
Whymight a condition such as cardiac hypertrophy(growth of the heart)change the mean frontal axis of the heart?
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Cardiac hypertrophy Thickening of the heart muscle hypertrophy refers to the compensatory hypertrophy of the ventricular myocardium due to physiological or pathophysiological events Or to put it in simpler terms it is an increase in cardiac muscle mass when cardiac muscle fibers thicken or cells become enlarged due to chronic and increased stress on the heart Left ventricular hypertrophyleft axis deviation Right ventricular hypertrophy right axis deviation Left Ventricular Hypertrophy LVH General ECG features include QRS amplitude voltage criteria ie tall Rwaves in LV leads deep Swaves in RV leads Delayed intrinsicoid deflection in V6 ie time from QRS onset to peak R is 005 sec Widened QRST angle ie left ventricular strain pattern or STT oriented opposite to QRS direction Leftward shift in frontal plane QRS axis CORNELL Voltage Criteria for LVH sensitivity 22 specificity 95 S in V3 R in aVL 24 mm men S in V3 R in aVL 20 mm women Other Voltage Criteria for LVH Limblead voltage criteria R in aVL 11 mm or if left axis
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