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The heart's electrical conduction system plays a very important role in cardiovascular functioning. Also known as the atrioventricular (AV) conduction system, it regulates and controls the timing of the heartbeat.
How does the heart's electrical conduction system work?
There is a collection of electrical cells in the upper right atrium of the heart known as the sinoatrial (SA) node which acts as a natural pacemaker and generates electrical signals. These signals travel through specialized electrical pathways and stimulate the muscular walls of the heart to contract in a rhythmic manner. This gives rise to the heartbeat that pulses at a specific frequency every minute.
What is the effect of fluctuations in electrical activity on the heart?
The standard heart rate in human being ranges from 60 to 100 beats per minute. It slows down when a person sleeps and speeds up when one experiences physical or emotional heightening. These fluctuations are triggered by the brain or other systems of the body and signal the SA node to generate charges more rapidly or slowly. This leads to spikes and drops in the heart rate, depending on the nature of the situation.
What happens when there is dysfunction in the heart's electrical activity?
When the heart's electrical conduction system does not function properly, it leads to the occurrence of a condition known as arrhythmia or abnormal heart rhythm. This happens when electrical impulses are generated in an irregular manner and causes tachycardia (rapid heartbeats) or bradycardia (slow heartbeats) which takes place in jarring infrequent tempos.
What causes fluctuations in the heart's electrical activity?
There are various kinds of triggers that cause the heart rate to fluctuate. The exact nature of fluctuation also depends on the type of trigger. A few everyday examples of these causes are as follows:
- Exercise and strenuous physical activity increases electrical activity as the heart is required to beat faster so as to increase the supply of blood and oxygen to the muscles.
- Sleep and rest reduce heart rate as the body is not needed to exert itself.
- Release of adrenaline into the bloodstream causes the heart rate to spike up. If you wish to discuss about any specific problem, you can consult a cardiologist.
I have a high blood pressure may I know if I eat 3 Days a week chicken or meat then is it good because I love this food and please give me some precautions regarding this also, I m very Upset because somewhere I read that eating of chicken in 3 Days a week is very big problem for us, l, so please give me some directions and precautions please.
A heart attack is usually characterised by the rupture of a plaque which can cause the spread of the cholesterol into the blood stream. Cardiovascular diseases are a major cause of pain, suffering and death around the world, today. Heart attacks are caused by coronary heart disease.
This is caused by the narrowing of the coronary artery when substances like cholesterol block it. If not treated and revived on time, a patient suffering from a heart attack can meet a fatal result. So how can you prevent a heart attack?
- Cholesterol: We are all affected to some extent by what we eat. It is important to keep a check on your cholesterol, especially if it is on the higher side, so as to prevent a heart attack. Cholesterol is known to directly cause a heart attacks, because if applies layer upon layer to the walls of the artery, and chokes them until they cannot handle the pressure any longer. So watch your food intake and bring down the blood lipid or fat levels with proper diet and exercise to alleviate the risk of a heart attack.
- Assess your Risk Factors: So are you at risk of heart disease and possible heart attack? This will very much depend on your medical history and allied ailments. If you are suffering from high cholesterol or even diabetes, your chances of having clogged arteries and a subsequent heart attack may increase manifold. Also, you may have a family history of heart diseases which can increase the risk of such ailments in your case. So, it is wise to assess your risk factors and take measures like regular checkups, medication where required and even other measures like diet and exercise.
- Blood Pressure: To prevent a heart attack, you can also keep your blood pressure in check. Constant spikes and dips can lead to a malfunctioning heart which can weaken the heart muscles and lead to a fatal result like a heart attack. Further, high blood pressure can lead to wear and tear of the inner lining of your blood vessels, which makes it that much more difficult for blood flow and circulation. So keep a blood pressure measuring machine or cuff at home, or visit your doctor regularly to keep tabs on your blood pressure.
While these basic measures can help take care of the immediate and most direct causes of heart attacks, you can also avoid passive and active smoking, and indulge in a good diet with plenty of exercise to keep your heart healthy. If you wish to discuss about any specific problem, you can consult a doctor.