Anatomy

Origin And Spread Of Cardiac Impulse Explain origin and spread of cardiac impulse. Answer: The conducting system of the heart is responsible for the origin and spread of cardiac impulse. Origin of impulse: Cardiac impulses are generated in the pacemaker which is sino-atrial node i.e., SA Node. SA node is situated in right-atrium just below the opening of … [Read more...] about Origin And Spread Of Cardiac Impulse

Heart Sounds Question 1. What are heart sounds? How are they produced? Mention their clinical significance. Answer: Heart Sounds Significance: Heart sounds is of diagnostic value to detect cardiac diseases involving the valves of heart. In the valvular lesions and septal defects alteration in the nature of heart sounds occur. Splitting of first heart sound … [Read more...] about Heart Sounds

Cardiac Output And Its Regulation Question 1. Electrocardiograph. Answer: The instrument or the ECG machine by which the electrical activities of the heart are recorded is called electrocardiograph. Electrocardiographic grid [ECG grid]: Electrocardiograph records the electrical signals produced from the heart on a moving strip of paper. The markings on this … [Read more...] about Cardiac Output And Its Regulation

Control Of Heart Rate Factors effecting heart rate. (or) Draw and label the special conductive tissues of heart. Answer: 1. Age: After birth, as age increases, vagal tone increases and heart rate decreases. In old age, heart rate is high due to fall in vagal tone. 2. Sex: Heart rate is slightly higher in females. "Understanding heart rate control through … [Read more...] about Control Of Heart Rate

Cardiac Conduction System Specialized junction tissues of heart. Answer: Synonym: Conductive tissues. Junctional tissues of heart: It comprises of "Understanding the cardiac conduction system through FAQs: Anatomy, functions, and uses explained" 1. AV node: Location: Posteriorly on right side of the interatrial septum near the opening of coronary … [Read more...] about Cardiac Conduction System