Parts of an ECG
The standard ECG has 12 leads. Six of the leads are considered “limb leads” because they are placed on the arms and/or legs of the individual. The other six leads…
Electrocardiogram (ECG)
An electrocardiogram (ECG) is a test which measures the electrical activity of your heart to show whether or not it is working normally. An ECG records the heart’s rhythm and…
High blood pressure: Tips for prevention
If you have risk factors for hypertension, you can take steps now to lower your risk for the condition and its complications. Add healthy foods to your diet Slowly work…
How to understand high blood pressure readings
Two numbers create a blood pressure reading: Systolic pressure: This is the first, or top, number. It indicates the pressure in your arteries when your heart beats and pumps out blood.Diastolic…
What is high blood pressure?
High blood pressure, or hypertension, occurs when your blood pressure increases to unhealthy levels. Your blood pressure measurement takes into account how much blood is passing through your blood vessels…
What is blood pressure?
When your heart beats, it pumps blood round your body to give it the energy and oxygen it needs. As the blood moves, it pushes against the sides of the…
Transmission of Cardiac Impulse
1. Conduction over Atrial Muscle: Cardiac impulse originated at the S.A node is transmitted over both the atria like concentric waves and thus the P wave is produced in E.C.G.…
Systemic and Pulmonary Circulation
Key Terms alveoli: Air sacs in the lungs that provide the surface for gas exchange between the air and capillaries.pulmonary circulation: The part of blood circulation which carries oxygen-depleted blood…
Heart Valves
The heart has four valves - one for each chamber of the heart. The valves keep blood moving through the heart in the right direction. The mitral valve and tricuspid valve are located between…
Cardiac Cycle
The period of time that begins with contraction of the atria and ends with ventricular relaxation is known as the cardiac cycle (Figure 1). The period of contraction that the heart undergoes…
