Mechanism of action of the heart

Mechanism of action of the heart

There are four valves in the heart, each of which may be damaged by a malfunction.

Core disorders in the operation of heart valves are classified into two groups:

Heart valve constriction: It affects the ability to pump blood and transfer it between the different parts (chambers) in the heart, requiring more pressure in the blood pump in order to reach the normal level that the heart usually pump.

Expansion of heart valve:

blood flow continues until the time that the heart valve is supposed to prevent blood flow, completely.

The large heart valve can be likened to a water tap that leaks out of the water, while the narrow heart valve can be compared to a water tap that does not fully open.

In the heart there is a connection system responsible for the transfer of electrical signals that stimulate heart contractions, regulate the timing of contractions and regulate the relationship between the contractions of the ventricles and the contractions of the atria.

At times, a defect in the functioning of the electrical transmission system can be reflected in:

the acceleration of the heart rate, the slow heart rate, the irregular heart rate, or the absence of any clear time relationship between the timing of the ventricular contractions and the timing of the contractions of the atria.

Heart disease may be congenital (Congenital Disease) and then heart murmur is heard when listening to the heart’s sound.

They may be acquired as a result of various infectious heart diseases that cause damage, directly or indirectly, to the heart valves.

Also the process of atherosclerosis, too, can cause damage to the heart valves. Signs of heart disease in the valves and their symptoms:

shortness of breath, falling fitness and increasing fatigue, coronary artery syndrome, irregular heartbeat and frequent fainting.

When a certain type of heart disease is suspected, you should go to your family doctor or an internist. Sometimes, according to different data, it may also be necessary to consult a cardiologist.

Understanding how and how the heart works makes it easier to understand the causes of heart disease.

The heart is a pump, a muscular organ the size of a fist, located to the left slightly of the center of the chest.

The heart is divided into two sides, left and right. The purpose of this chapter is to ensure that oxygen-rich blood is not mixed with oxygen-free blood. Oxygen-free blood is a blue color, returning to the heart after being in the body.

The right side of the heart consists of the right atrium and the right ventricle. It receives blood from the lungs and pumps it through the pulmonary arteries.

The lungs build up the blood and replenish it with the new oxygen, changing its color as a result and becoming red. The oxygen-rich blood flows here from the right side to the left side of the heart, which also consists of the left atrium and the left ventricle. From there (from the left side) blood is pumped into the body, across the aorta, to supply various body tissues with oxygen and various nutrients.

The four valves in the heart are responsible for the proper blood flow. They all work like gates in a fence. The valves open only in one direction and only when pressed. Each valve opens and closes once every single pulse of the heartbeat, or once every second, almost, at rest time.

The heart has two conditions:


In this case, the right and left ventricles contract the blood into the blood vessels and through them to the lungs and the rest of the body. The right ventricle contracts slightly before the left ventricle.


The right and left ventricles proliferate, filled with blood coming from the right and left atrium. The cycle begins again.

In the heart, too, there is an electrical wire network responsible for the continuous heartbeat. The electrical impulses start from the top, in the right atrium, and then pass in a special path to the ventricles carrying the orders to draw blood.

The transport system is responsible for ensuring the pulse of the heart, at a consistent and healthy pace, so that the blood, through it, continues to circulate rotationally. The continuous switch between oxygen-rich blood and oxygen-free blood is the process that preserves the continuity of life.

Causes of cardiovascular disease

The term “cardiovascular disease” refers to several types of cardiovascular disease. This name is often called, too, for damage to the heart or blood vessels caused by atherosclerosis build up layers of fat inside the arteries.

Over time, very high pressure on the arteries can make the walls more rigid (less softer) and thicker, which may sometimes impede the flow of blood to various organs and tissues.

This is called “arteriosclerosis” (or atherosclerosis), the most common type of disorder, the most common risk factor for vascular disease.

The causes of this disorder (calcification of the arteries) are:

unhealthy diet, lack of physical activity, obesity and smoking.

These are all serious risk factors for the development of atherosclerosis, leading to the development of cardiovascular disease.

Causes of arrhythmias:

Common causes of arrhythmia, or diseases that may disrupt systems, include:

Congenital heart defects

Coronary artery disease




Overuse of alcohol and caffeine

Drug Addiction


Some non-prescription drugs, certain prescription medications, some dietary supplements and some herbal remedies

Heart valve disease.

A heart arrhythmia is not likely to pose a risk to a healthy person’s life and heart in normal and normal condition, without external interference such as electric shock or drug abuse. This is because the heart of a healthy person does not suffer from any abnormal condition that can cause arrhythmia (arrhythmias).

Either in the heart or the patient

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