Atherosclerosis (Hardening of the arteries)
Atherosclerosis is the name of the process in which deposits of fatty substances, cholesterol, calcium and other substances build up in the inner lining of an artery. This buildup is called plaque. Plaques can grow large enough to reduce the blood's ability to flow through an artery. The most severe damage occurs when plaques become unstable and rupture. Ruptured plaques contain material that causes blood to form a clot. Blood clots can block blood flow or break off and travel to another part of the body. If this process occurs and a blood clot blocks an artery that feeds the heart, it causes a heart attack. If it blocks an artery that feeds the brain, it causes a stroke. Heart disease and stroke are the #1 and #3 most common causes of death in this country.
It manifests itself in 3 main forms: (can also involve arteries to other organs)
- Coronary Artery Disease — can lead to angina, heart attack, congestive heart failure and arrhythmias.
- Cerebrovascular Disease — can lead to stroke.
- Peripheral Artery Disease — can lead to leg pain, aneurysms, ulcers, gangrene, non-healing infections and even the need for amputation.
Risk factors include genetics (family history) and the following controllable risk factors:
- High cholesterol (especially LDL or "bad" cholesterol)
- Cigarette smoking and exposure to tobacco smoke
- High blood pressure
- Diabetes
- Obesity
- Physical inactivity
Click for warning signs of heart attack and stroke.
Treatment:
- Optimal control of risk factors with a combination of medication and healthy lifestyle habits are critical.
- Medications such as aspirin & cholesterol lowering medication should be taken by all patients with this disease.
- Blood pressure medication is also usually required to control blood pressure.
- Treatment with angioplasty and stent or bypass surgery may be necessary to restore normal blood flow.
Congestive Heart Failure
Heart Failure is truly the failure of the heart to perform its normal duties as a pump. In general this is due to the heart becoming too weak or too stiff. This can result in poor blood flow to the body's vital organs and elevated pressures in the heart and lungs which can ultimately lead to congestion or an abnormal build up of fluids in the chest, abdomen and extremities.
Causes can include: Coronary artery disease, past heart attacks, high blood pressure, abnormal heart valves, heart rhythm disorders, thyroid disease, drug or alcohol use, viral infections, congenital heart defects, genetic disorders and other rare causes.
Symptoms include: shortness of breath, fatigue and swelling. Everyday activities such as walking, climbing stairs or carrying groceries can become very difficult. Heart failure is a serious condition, but many people with heart failure lead a full, enjoyable life when the condition is properly diagnosed and managed. For optimal outcomes people need to work closely with their care providers to incorporate healthy lifestyle changes in addition to using medications and considering surgical options. It's also helpful to have the support of family and friends who understand your condition.
Heart Rhythm Disorders
The heart is a muscular pump that is normally guided by its natural pacemaker, the sinus node, through a sequence of electrical impulses that travel through the heart allowing it to pump in a mechanically efficient manner. Heart rhythm disorders or "arrhythmias" are abnormal variations in the normal sequence of electrical impulses through the heart. The electrical impulses may happen too fast, too slowly, or erratically. Some arrhythmias are rather benign, and others can be life threatening. When the heart doesn’t beat properly, it can’t pump blood effectively. When the heart doesn’t pump blood effectively, the lungs, brain and all other organs can’t work properly and may shut down or be damaged.
General Examples: |
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| Bradycardia = slow heart rate |
Tachycardia = rapid heart rate |
| Fibrillation = very rapid and erratic heart rate |
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Specific Conditions:
Atrial Fibrillation — the most common heart rhythm disorder. See this link for more information.
Sick Sinus Syndrome — group of heart rhythm disorders in which the sinus node — the heart's natural pacemaker — doesn't work properly. The condition is most likely to affect adults older than age 70. Many people with sick sinus syndrome eventually need a pacemaker to keep the heart in a regular rhythm.
Supraventricular Tachycardia (SVT) — group of heart rhythm disorders that originate in the top chambers of the heart. See this link for more information.
Ventricular Tachycardia / Fibrillation — life threatening heart rhythm disorders that originate in the bottom chambers of the heart. They can result in sudden cardiac death. Patients who have had ventricular tachycardia or fibrillation identified may benefit from a defibrillator.
Stroke (Cerebral Infarction)
A stroke occurs when a blood vessel that carries oxygen and nutrients to the brain is either blocked by a clot or bursts. When that happens, part of the brain cannot get the blood (and oxygen) it needs, so it starts to die. The brain is an extremely complex organ that controls various body functions. If a stroke occurs and blood flow can't reach the region that controls a particular body function, that part of the body won't work as it should. The effects of a stroke depend primarily on the location of the obstruction and the extent of brain tissue affected. Effects can include vision and other sensory impairment, speech/language/comprehension problems, paralysis, memory loss, severe disability and even death. A TIA is a transient form of stroke with symptoms lasting less than 24 hours due to a temporary obstruction of blood flow. Treatment to help reduce the risk of stroke includes anticoagulant and antiplatelet medications and carotid endarterectomy or carotid artery stenting.
For severe heart valve disease, valve surgery is often the best (and sometimes the only) treatment option.
Click on the following to see how to prepare for heart surgery and what to expect after heart surgery.