Which of the following is true in AF?

Cardiology
  • The JVP has a single waveform rather than a double waveform
  • It can be diagnosed without an ECG
  • It is strongly associated with hypercholesterolaemia
  • It carries no increased mortality compared to normal sinus rhythm
  • The JVP characteristically has giant V waves

The JVP has a single waveform rather than a double waveform

A superb question! The JVP normally has an “a” wave and a “v” wave. These are from atrial and ventricular contraction respectively. Hence in AF where the atrium is fibrillating you get no a wave.

Giant V waves occur in tricuspid regurgitation.

You need an ECG to diagnose AF because things like ectopics can cloud the matter (e.g. frequent atrial ectopics).