Analysis and Interpretation of Cardiac Diseases using Heart Signal

By C K Roopa

Electrocardiogram (ECG) is one of the most simple, easily accessible, affordable,

feasible and non-obtrusive examinations that evaluate the heart's electrical system to

detect heart diseases. The chronic disease that causes the most number of deaths

worldwide is Cardiovascular Diseases (CVD). It isn‟t only a concern of developed

nations but also the contrary. In a report authored by the WHO in 2005, it is mentioned

that about 80 percent of deaths throughout the world caused by cardiovascular disease

happen in low-income and middle income nations. Heart Sound (HS) and

ElectroCardioGram (ECG) auscultation are the most commonly used tools for the

diagnosis of cardiovascular diseases, providing complementary information like

facilitating evaluation of the electrical action of the heart (ECG) and providing

information about the mechanical action of the heart (HS).

Some of the other signals like PPG (PhotoPlethysmoGram) and ICG (Impedance CardioGram) are still employed

in research scenarios but less used in day-to-day practice. ECG as shown in figure 1 is a graphical representation of heart muscle electrical

Activation (Depolarization) and Relaxation (Repolarization). It is represented by

various waves, segments and intervals. "P‟ wave depicts atrial (upper chamber of the

heart) depolarization. "PR‟ interval gives information about the conduction of electrical

impulse from upper chamber to lower chamber of the heart. "QRS‟ wave depicts

depolarization of Ventricle (lower chamber of the heart). "ST‟ segment and "T‟ wave

give information about repolarisation of the Ventricle (lower chamber of the heart).

Predominant part of the ECG which depicts blockage is "ST segment‟. Commonly,

ECG is taken in 12 lead formats. There are many more leads, taken in specific

circumstances. Different lead views of cardiac electrical activity from various directions

in both horizontal and frontal axis can also be captured for identifying and localizing the

problem with reasonable accuracy.

• Format: Paperback
• Language: English
• ISBN: 5658364574
• ISBN13: 9785658364575
• Release Date: August 2022
• Publisher: Aqeel Ahmed
• Length: 134 Pages
• Weight: 0.42 lbs.
• Dimensions: 0.3" x 6.0" x 9.0"