The drugs under this group prevent or treat the irregularities of cardiac rhythm. Cardiac Arrhythmias: Cardiac arrhythmias are the abnormalities in the rate, regularity, site of origin of the cardiac impulse, or a disturbance in conduction of the impulse such that the normal sequence of activation of atria and ventricles is altered. The arrhythmias occur due to either faulty impulse [...]
In this article we will discuss about:- 1. Meaning of the Cardiac Muscle 2. Properties of the Cardiac Muscle 3. Action Potential. Meaning of the Cardiac Muscle: The muscle is involuntary and striated. The muscle fibers repeatedly branch and interdigitate. Wherever these branches come in contact an intercalated disk present, it will maintain continuity with the surrounding fibers through gap [...]
The following points highlight the top eight factors affecting venous return. The factors are: 1. Pressure Gradient 2. Vis-a-Tergo 3. Vis-a-Fronte 4. Skeletal Muscle Pump 5. Thoracic Pump 6. Abdominal Pump 7. Venomotor Tone 8. Posture and Gravity. Factor # 1. Pressure Gradient: The pressure in the right atria (central venous pressure) into which the superior and inferior vena cavae [...]