Category: Cardiology

Reynolds number: Re = (V x d x rho) / eta. When Reynolds number is above 2000, flow becomes turbulent. When viscosity increases, Reynolds number decreases.

Continuous murmur is a murmur which starts in systole and continues uninterruptedly through the second heart sound into part or whole of diastole.

Prominent systolic murmur with severe cyanosis is in favour of DORV than Tetralogy of Fallot. Prominent left parasternal heave is more likely in DORV.

In Tetralogy of Fallot with flap valve VSD, a flap attached to the VSD will restrict flow across the VSD and can cause supra systemic RV pressure.

Two independent rhythms on an electrocardiographic recording noted in: "piggy back" transplant, maternal and fetal ECGs, re-recording on same Holter tape.

ECG features of parasystole are: varying coupling interval, inter ectopic interval has a common denominator other than 1 and fusion beats.

Differentiation of late diastolic ventricular ectopic from intermittent pre-excitation: PJ interval constant in WPW syndrome, can vary in late diastolic VPC

The most important causes of irregularity in ventricular tachycardia are capture beats and fusion beats.

Short RR interval following a long RR interval causes aberrant conduction with right bundle branch block pattern, known as Ashman phenomenon.

Electrophysiological hall mark of intra Hisian block is split His potential.