Category: Cardiology

WPW syndrome is characterized on the ECG by a short PR interval, wide QRS complex and a delta wave at the beginning of the QRS complex.

Starlings law of the heart states that the force of contraction of the heart muscle is directly proportional to the initial fibre length.

DDI mode: A functional mode of the pacemaker in which both chambers are sensed and both chambers are paced, in the inhibitory mode.

Aliasing: Phenomenon in Doppler echocardiography occurring when the velocity is beyond the Nyquist limit, the direction of flow is depicted as opposite.

Jatene's procedure is arterial switch operation, a corrective surgery for d-transposition of great arteries (d-TGA).

When conduction through left bundle is delayed or blocked, a characteristic pattern is seen on ECG, which is known as the left bundle branch block (LBBB).

If the cervical rib compresses the nerve root from the spinal segment supplying the heart, pain will be similar in location to that of heart attack.

Heart muscle contraction occurs due to the sliding in of actin and myosin myofilaments so that the length of the sarcomere decreases.

Genetically determined high cholesterol also responds to low fat diet, exercise and medicines like statins. Some may need LDL apheresis.

Stroke volume is the amount of blood ejected from the ventricles into the arterial bed with each contraction.