What Happens When the Electrical Activity of Your Heart Changes?

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.



What Happens When the Electrical Activity of Your Heart Changes?

Egg yolk and cholesterol - is there a link?

Although egg is considered one of the most nutritious foods, people with high cholesterol avoid its consumption as they believe that eggs may increase cholesterol and risk heart diseases.

Is there a link between egg yolk and cholesterol?

Egg yolk is rich in dietary cholesterol. One large egg contains 185 milligrams of cholesterol. People with normal cholesterol levels require about 300 milligrams of dietary cholesterol and people with high cholesterol need 200 milligrams of dietary cholesterol from food.

Dietary cholesterol has the minimum impact on blood cholesterol as compared to saturated and trans fats which contain bad cholesterol. Hence dietary cholesterol present in egg yolk has minimal or no effects on increasing your cholesterol levels.

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Egg Yolk and Cholesterol - Is There Really a Link?

Shortness of breath, medically known as dyspnea, is the sensation of tightening of chest accompanied by a feeling of suffocation. Most of us would have experienced this while doing intensive exercise, while in extreme temperature or high altitude to a certain extent. But when the breathlessness is severe, it is due to a lung or heart ailment. The lungs and the heart play the most important role in transporting oxygen to our tissues and removes carbon dioxide. And so, any kind of problem in either of the organs can affect our breathing.

Causes:
Numerous underlying conditions can lead to a shortness of breath. An insight into the most common causes are enumerated below.

Asthma: One of the common reason for shortness of breath is asthma. It is a serious condition in which the passage of air becomes narrow and swells up and produces extra mucus. This can result in shortness of breath, triggers wheezing, coughing and also makes breathing difficult. It cannot be cured but the symptoms can be controlled, and it is also necessary to consult with the doctor to track the symptoms and adjust the treatment.
Carbon monoxide poisoning: Another leading cause of shortness of breath is carbon monoxide poisoning. It is caused when carbon monoxide builds up in our blood stream. When there is excessive carbon monoxide in the surrounding air, our body replaces the oxygen in our red blood cells or RBCs with the carbon monoxide in the air. Appliances that are improperly ventilated and engines, especially in a sealed or tightly enclosed space might allow carbon monoxide to accumulate in our blood stream to a dangerous level.
A hiatal hernia: This is caused when part of our stomach pushes upward through your diaphragm. Our diaphragm usually has a small opening through which our esophagus or food pipe passes and connects the stomach. The stomach pushes up through this opening in case of a hiatal hernia and results in shortness of breath. In most of the cases it can be cured by medications, but in some situations, surgery is required.
Pulmonary embolism: It is a blockage in one of the pulmonary arteries in the lungs. In 95% of the cases of pulmonary embolism, it is caused due to blood clots that travel to the lungs from the legs or some other parts of the body. As the clot blocks the flow of blood to the lungs, it can also be life threatening besides causing a shortage of breath.
Apart from these conditions, others such as bronchitis, pneumonia, lung cancer, COPD, arrhythmia, hypertension, and many other lung and heart ailments can result in shortness of breath and can lead to dire consequences in certain cases. Thus, it becomes paramount to consult a pulmonologist when you frequently experience such breathing difficulty.

Shortness Of Breath - 4 Most Common Reasons Of It!

Know Your Cholesterol 

Cholesterol is a waxy, fat-like substance that’s found in all cells of the body. The term cholesterol is often directly related to a heart condition. But the truth is that not all types of cholesterols are harmful for your body. It is important that one knows about the different types of cholesterol, having healthy levels of both types of lipoproteins is important, deal with them appropriately and lower the chances of having a stroke or getting a heart disease. Bad cholesterol levels can be high in people irrespective of them being thin, if it is genetic or if they are smokers.

Types of Cholesterol.

The Bad One:

LDL cholesterol sometimes is called “bad” cholesterol. A high LDL level leads to a buildup of cholesterol in your arteries. Lowering your cholesterol may slow down, reduce, or even stop the buildup of plaque in your arteries. It also may reduce the risk of plaque rupturing and causing dangerous blood clots.

The Good One:

HDL cholesterol sometimes is called “good” cholesterol. This is because it carries cholesterol from other parts of your body back to your liver. Your liver removes the cholesterol from your body and  is important for the body as it reduces the risk of heart attack, disease and strokes.

Cholesterol count of the body is counted by adding the two types of cholesterols (LDL and  HDL) along with body's triglyceride level. Triglycerides are a type of fat found in your blood. Too much of this type of fat may raise the risk of coronary artery disease.

The level of your cholesterol shows the level of risk your body is in, to have a stroke or a heart condition. Other factors which determine the risk are whether the person is a smoker, diabetic, has high blood pressure along with their age, sex and race.

Cholesterol levels are affected by:

1. Genetics: Genetics have a direct effect on your cholesterol level. If the levels have been high in the previous generations, you are automatically at higher risk of this condition.An inherited condition called familial hypercholesterolemia causes very high LDL cholesterol.

2. Age and Weight: Once we cross the age of 20, our cholesterol level starts to rise. Being overweight however is also a high risk factor of increased levels of bad cholesterol in the body as well as developing heart disease.

3. Lifestyle: Less or no exercise is another reason which reduces the good cholesterol in the body, as does being overweight. Regular exercise however reduces LDL and increases HDL in the body. Also a diet rich in saturated fats makes your LDL levels shoot up and puts you to higher risk.

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 Know Your Cholesterol: Good Vs Bad

Hemothorax is a serious and possibly a life-threatening condition in which blood collects between the lungs and the chest wall due to a traumatic injury or some other factor. It can be caused due to an extrapleural or an intrapleural injury. An extrapleural injury damages the chest wall on the outside while an intrapleural injury damages the chest wall on the inside.
Sometimes, Hemothorax is accompanied by excess air in the pleural cavity, known as pneumothorax. If they both occur at the same time, the condition is said to be hemopneumothorax. When blood accumulation is as large as nearly one liter, it has the potential to lead to shock and is referred to as Massive Hemothorax, which can be fatal.

Causes-
Hemothorax can be caused by a number of factors discussed as follows:
  Traumatic injury in an accident or sports causes the pleural lining of the lungs or chest to rupture. It causes blood to spill over into the pleural cavity, and it finds no way to drain itself out. Chest and lungs are so sensitive that even the smallest of injuries (or seemingly small) have the potential to cause Hemothorax.
  Tuberculosis and other lung infections can cause Hemothorax.
  Pulmonary embolism refers to a blood clot in the lungs that can cause Hemothorax.
  Lung or pleural cancer also have the potential to cause grave disease.
  Defective blood clotting as in hemophilia in which blood lacks clotting factors can cause Hemothorax.
  Tissue necrosis in the lungs or pulmonary infarction is a lung tissue dysfunction which can cause Hemothorax.
  Tearing of pulmonary blood vessels due to an invasive surgical procedure also has the potential of causing Hemothorax.
  Patients who have undergone major surgeries like lung transplant and open- heart surgery are very likely to get Hemothorax.


Symptoms-
There are many symptoms associated with Hemothorax like low blood pressure, rapid rate of heart, cold and pale skin color, chest pain while breathing, tense and shallow
breathing, difficulty in breathing, anxiety, and restlessness.


Diagnosis-
  Physical examination includes listening to the sounds of abnormal breathing and to the sounds of liquid in the chest.
  An X-Ray image reveals the presence of liquid in the pleural cavity.
  A full Computed Tomography Scan can reveal the occurrence as well as the cause of Hemothorax.
  An ultrasound provides good insight into the situation of the lungs and the pleural cavity.
  Sometimes, a sample of the pleural fluid is extracted for test and diagnosis.


Treatment-
The procedure is performed under anesthesia. A catheter or a needle is inserted into the chest through ribs for removing air and blood from the pleural cavity. If the lung collapses, it is expanded using the chest tube, which is left attached to a closed system. This ensures the escape of air and fluid from the pleural cavity and prevents additional air from entering the pleural space. This section is hence left in a water seal or hooked up to suction.
If the injury is small, chest drainage might be sufficient depending upon the case. However, if there is a major injury, it might require stopping bleeding at its source through a surgery.


Take Away-
Hemothorax can cause a collapsed lung that might progress to lead to respiratory failure. If left untreated, Hemothorax can cause infection in pleura, lung or pleural fluid in the chest cavity. Hemothorax can cause scarring of the lung tissue and pleural membranes. Retained Hemothorax occurs when blood stays in the pleural cavity for too long. It might clot and get difficult to remove through the catheter. It might also cause the buildup of pus in the surrounding region leading to an infection. Retained Hemothorax is treated by draining the fluid differently or through a video-assisted surgical procedure. Before opting for any treatment or surgery, one should always consult a doctor.

Chest Injuries And Hemothorax - Know How Serious It Can Be!

The heart muscle is the central pumping machine that ensures that blood flow throughout the body is maintained and all other organs have a regular supply. One of the conditions that can cause this organ to malfunction is cardiomyopathy, wherein the heart is unable to pump the blood to all parts of the body. This condition can even lead to heart failure and is something that needs to be addressed and diagnosed quickly.

Symptoms of Cardiomyopathy
Early stages of cardiomyopathy may be difficult to detect externally, although it may be slowly reducing your heart s capacity. Symptoms that start showing in later stages may include:

Constant fatigue, even without physical activity
Fluid may build up and thus cause bloating within the body
Persistent coughing while lying down
You may have irregular heartbeats that may sometimes be quite rapid
Due to the lack of blood supply, you may feel lightheaded, dizzy and might even cause you to faint
Even the slightest of exertions will cause breathlessness and exhaustion and you may even feel this symptom while at rest
Intermittent chest pain
Causes of Cardiomyopathy
Causes of this condition may vary from patient to patient, although certain common factors include:

Genetic reasons where one or both parents are susceptible to this condition
Metabolic problems such as obesity, diabetes or thyroid problems
Substance abuse such as anabolic steroids, amphetamines cocaine or even the consumption of excessive alcohol
High blood pressure for prolonged periods
Nutritional deficiencies
Side effects of drug treatments such as the use of certain chemicals in chemotherapy
Types of Cardiomyopathy
Cardiomyopathy has multiple types; depending on what causes them and also certain specific symptoms. These are:

Restrictive cardiomyopathy
Dilated cardiomyopathy
Arrhythmogenic right ventricular dysplasia
Hypertrophic cardiomyopathy
Unclassified cardiomyopathies
Treatment for cardiomyopathy
The treatment of these various forms of cardiomyopathy will vary depending on the type and also the stage and condition of the heart. Some of these treatments include:

Medications
Lifestyle changes
Surgeries such as Septal myectomy, Septal ablation and Radiofrequency ablation
Implantable devices such as Implantable cardioverter-defibrillator or ICD
Ventricular assist devices
Heart transplant in the worst case scenarios

Cardiomyopathy -  Decoding the Types + Treatment

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