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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.
Is the headrush, and fatigue a cause of low blood, blood pressure? How to increase the blood pressure naturally.
I am a 34 yes male. My blood pressure is always on the extreme higher side. I take codex daily. Is this the reason for my high blood pressure. How will codex affect my health.
She is suffering from chest pain and there is cough but it is not coming out of chest. There is bit of water in chest.
Dear Sir. I am 33 yrs old. My weight is 115 kg.Having medication of hypertension and thyroid. My cholesterol is also high. From Last few days facing . Problem in my knees. After some walking. There was pain in knee. If i sit continous 2 hour. Then face some difficulty to stand straight.
I am 23 years old female and I have acne over my face, back, shoulder, chest since 5 years. So please recommend me best treatment to treat my acne. Thank you.
How to control frozen shoulder, m diabetic patient and heart patient, Please l advise the therapy needs to be followed.
I am 18 year old. My sgpt is 96 and esr is 25. I always have pain in my left hand and left leg only. With trembling as well. My pulse rate is always high.
I am suffering from cholesterol gland in my body, there are no hurt for me, please suggest solution for future purpose, What should I do decrease cholesterol? What type of diet as well as exercise for help less cholesterol? Please provide details knowledge about this?
Hello doctor. When I breathing pains in my left side of chest. Did not know its about lung or heart. Pls suggest me what can I do. Thanks.
I am 71 male with hypertension, as per doctors advice I am taking 3 drugs nodon2.5/dilnip10/minipressxl2.5 ll, I have dobut still my bp is above 170/60 what would you suggest ?
Hi i m 27 yrs old have problem of high cholesterol levels n thyroid level imbalances so i 89 k gs n want to loose weight quickly. Suggest me steps n precautions .I want to know how can u keep my levels in check without any medicines.and what precautions i must take? Thanks
When am I over active i.e. Working standing for 1-2 hours I get moving / imbalance feeling. On days I am not active (this doesn't happen is it related to low bp. Got it checked by doc. But came normal. Home test shows around 110-99/66. Can it be possible that it is due to inner ear. What symptoms should I notice to understand the reason for this problem.
Sir my grandma have high blood pressure. But I feeling she have some stomach problem from last 1 months. And her b.p is always increasing or decreasing. Not stable. I am always changing the medicine. What to do.?
I am 55yr old male I am using tab amlace 5mg bpcontrol and diabcon-ds for sugar control when I penetrate within few seconds I ejaculate my wife get frustrated please help me my bp and sugar in control in morning I get hard erection.
The new epidemic that has taken the world by storm is obesity. The proportion of obese people is increasing and the age of onset of obesity is decreasing gradually. There is an optimal weight for a given height of a person. Obesity is when a person's weight is 20% more than the optimal weight. It brings with it a host of other health conditions, as it impairs the body’s overall functioning.
- Diabetes 2: In a normal person, food gets broken down into glucose to provide the required energy for the body using insulin. The body’s inability to produce sufficient insulin to convert the excessive amount of sugar in the body leads to diabetes. Growing to be a leading cause of early death, diabetes brings with it a host of complications affecting almost all systems and parts of the body including stroke, kidney disease, blindness, and death. Diabetes and obesity have a direct correlation and can be prevented and managed by eating a balanced diet, losing weight, exercising, and having a healthy lifestyle.
- Heart problems: An increased BMI also ups the risk for coronary heart disease (CHD), where the blood vessels are narrowed due to constant accumulation of fat in their inner walls. This gradually reduces the blood flow through these and may when complete cut-off happens, it could result in heart attack or stroke, affecting the heart or the brain. There could also be cases where the heart fails to pump sufficient blood to the rest of the body, affecting their effective functioning. Obese people also have a higher blood pressure than people who maintain a good BMI.
- Breathing problems: One of the main causes of labored breathing is excessive weight. The condition called sleep apnea which is sudden bouts of absence of breathing during sleep is very high in obesity. It can cause snoring, daytime sleepiness, increase the risk of heart disease and stroke. In people with sleep apnea, weight loss is one of the first and most recommended therapies. Asthma and general breathing disorders are also higher in obese people.
- Abnormal body cholesterol: Obese people also tend to have abnormally higher levels of body fat, especially the bad cholesterol, which again leads to coronary disease. It is a vicious cycle with one leading to the other and aggravating the other.
- Osteoarthritis: Added weight leads to pressure on the hips, knees and lower back. There is added wear and tear and pain, which further limits movement.
- Cancer: Some cancers, of the colon, endometrium, kidney, pancreas, gallbladder, breast and esophagus are more prevalent in obese people.
These are just some, there are more. The best way to avoid all these is to watch your weight. If you wish to discuss about any specific problem, you can consult a doctor.