Q. Which of the following statements is not true? A PR interval of 0.3 sec with a heart rate of 50/min in an asymptomatic 60-year-old on beta blockers needs pacemaker implantation Wencekback blocks are fairly common in young adults especially during sleep and require no treatment A wencekback block in an 85-year-old with recurrent presyncope may require pacemaker implantation A persistent Mobitz type 2 block after anterior wall MI with a ventricular rate of 50/min should still get a pacemaker implanted Time's up Related