The electrocardiogram as the name suggests, is a record of the electrical activity of the heart. Though cardiac electricity was first recorded by Augustus Desire’ Waller in 1887, the most comprehensive work on human electrocardiography was done by William Einthoven in 1903. He was awarded the Nobel Prize for this in 1924. As the electrocardiogram records only the electrical activity of the heart, it cannot give any idea about the mechanical function of the heart and is therefore limited in giving information about the status of the heart. However, it …

Heart rate is the number of heartbeats per unit of time or expressed as beats per minute(bpm). Heart rate could vary from time to time such as during exercise or sleep.
Doctors used to measure the heart rate usually to diagnose and track of medical conditions. Heart rate could be measured by finding the pulse at the body surface. The pulse rate is measurable by finding the artery’s pulsation on the body where it is transmitted to the surface by pressing it with index and middle fingers. Usually, the thumb is …

Coronary artery bypass grafting (CABG)-Definition
Coronary artery bypass grafting(CABG) is one of the most commonly performed major operations. It is advised to the group of people who are having coronary artery disease (CAD) or coronary heart disease(CHD). In this case the coronary artery disease which prefers for CABG is the condition where the coronary arteries supply oxygen and nutrients to the heart muscle get narrowed or blocked by some of the substances present in the blood. The substances are cholesterol, fat, plaques and calcium that block the arteries. CABG is preferred …