The ECG of a 40 year old male was recorded using standard bipolar limb leads. The sum of the voltage of the three standard leads was found to be 5 millivolts. This indicates:
Correct Answer: Increased cardiac muscle mass
Description: “When the sum of the voltages of all the QRS complexes of the three standard leads is greater than 4 mV, the patient is considered to have a high-voltage electrocardiogram. The cause of high-voltage QRS complexes most often is increased muscle mass of the heart, which ordinarily results from hypertrophy of the muscle.” So, in general its hypertrophy of heart (may be right or, left ventricular), but you cannot determine whether it is due to right or, left ventricular hypertrophy.
Category:
Physiology
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