In ECG Tracings, Extension of the P-R Interval to More

question 89

Multiple Choice

In ECG tracings, extension of the P-R interval to more than 200 msec most likely can indicate which of the following?

• A) coronary ischemia or myocardial damage
• B) congenital heart defect
• C) electrolyte disturbances
• D) damage to the conducting pathways
• E) inadequate blood supply to the heart

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