NEETZoologyBody Fluids and Circulation
What is the significance of the letter P in an ECG?
Options
- AIt represents a specific electrical activity of the heart
- BIt represents the heart rate
- CIt represents the heart sound
- DIt represents the cardiac output
Correct answer
A. It represents a specific electrical activity of the heart
Step-by-step solution
Electro-cardiograph is used to obtain an electrocardiogram (ECG). ECG is a graphical representation of the electrical activity of the heart during a cardiac cycle. To obtain a standard ECG a patient is connected to the machine with three electrical leads (one to each wrist and to the left ankle) that continuously monitor the heart activity. For a detailed evaluation of the heart’s function, multiple leads are attached to the chest region. Here, we will talk only about a standard ECG. Each peak in the ECG is identif