J.K. denies smoking and alcohol intake.
Cardiac examination reveals irregular rhythm.
J.K. was given a 1 mg loading dose of digoxin followed by a 0.25 mg QD maintenance dose and is being started on a trial of oral quinidine. She has had similar episodes approximately twice a year for the past 2 years but has not sought medical attention for them. He relates a history of many similar self-terminating episodes since he was a teenager. He took an unknown medication 5 years ago which decreased occurrence of the palpitations, but he stopped taking it due to side effects. Within 2 minutes VF is noted on the monitor.