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Sum of voltage of 3 leads in ECG 5 millivolts?
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Increased cardiac muscle mass

Depolarization of atria in ECG is seen in?
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P wave

Depolarization in ECG by?
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P and QRS complex

P wave size in right atrial enlargement?
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2.5 mm

Ventricular Depolarization starts from?
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Left part of Interventricular septum

Time required for ventricular depolarization?
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0.08 to 0.1 sec

QRS complex indicates?
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Ventricular depolarization

QRS duration 100 - 120 ms?
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Wide QRS complex typically seen in?
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Bundle branch block

Massive QRS is associated with?
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Pompe’s disease
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