BS.
Absolute BS
Think again. This is actually a known complication from longstanding or sliw-to-resolve flu/cold infections.
An ECG taken in the wake of this problem will alarm like crazy if spots of dead cardiac muscle tissue had been left behind. Scar tissue does not conduct electricity. So pacing pulses (from node to node to node) are at risk of scattering and sending an otherwise healthy young heart into fibrillation (massive heart attack, often fatal and with no advance warning unless a doctor thought to prescribe an ECG or echocardiogram to rule out just this problem). If found before such an attack, a heart transplant may be the only good option.