Heart rhythm disorders vary from minor palpitations, premature atrial contractions (PACs), premature ventricular contractions (PVCs), sinus tachycardia, and sinus brachycardia, to abnormal heart rhythms such as tachycardia, ventricular fibrillation, ventricular flutter, atrial fibrillation, atrial flutter, paroxysmal supraventricular tachycardia (PSVT), Wolf-Parkinson-White syndrome, brachycardia, or heart blocks. Treatment is dependent upon the type of heart rhythm disorder. Read more: Abnormal Heart Rhythms (Heart Rhythm Disorders) Article
Multimedia: Slideshows, Images & Quizzes
Heart Disease: Causes of a Heart Attack
Learn about heart disease and heart attack symptoms and signs of a heart attack in men and women. Read about heart disease...
Heart Disease: Symptoms, Signs, and Causes
What is heart disease (coronary artery disease)? Learn about the causes of heart disease. Symptoms of heart disease include chest...
Stroke Causes, Symptoms, and Recovery
What is a stroke? Learn about stroke symptoms like sudden numbness or weakness, confusion, vision problems, or problems with...
Am I Having a Heart Attack? Symptoms of Heart Disease
Heart attacks symptoms vary greatly for men and women, from anxiety and fatigue to nausea and sweating. Learn the warning signs...
Atrial Fibrillation: Heart Symptoms, Diagnosis, & Afib Treatment
Atrial fibrillation is the most common type of abnormal heart rhythm. Atrial fibrillation or AF can lead to serious heart...
Picture of Heart Detail
The heart is composed of specialized cardiac muscle, and it is four-chambered, with a right atrium and ventricle, and an...
Picture of Heart Catheter
Catheter procedures are much easier than surgery on patients because they involve only a needle puncture in the skin where the...
Picture of Heart
The muscle that pumps blood received from veins into arteries throughout the body. See a picture of the Heart and learn more...
Related Disease Conditions
Congestive Heart Failure (CHF) Symptoms, Stages, and Prognosis
Congestive heart failure (CHF) refers to a condition in which the heart loses the ability to function properly. Heart disease,...
12 Heart Attack Symptoms and Early Warning Signs
Recognizing heart attack symptoms and signs can help save your life or that of someone you love. Some heart attack symptoms,...
Anemia is the condition of having less than the normal number of red blood cells or less than the normal quantity of hemoglobin...
Low Blood Pressure (Hypotension) Symptoms and Treatments
Low blood pressure, also referred to as hypotension, is blood pressure that is so low that it causes symptoms or signs due to the...
High Blood Pressure (Hypertension)
High blood pressure is defined as a pressure of 140/90 mmHg or higher in the arteries. Genetic factors, high salt intake, and...
Pulmonary edema (swelling or fluid in the lungs) can either be caused by cardiogenic causes (congestive heart failure, heart...
Stroke (Signs, Symptoms, Warning Signs)
A stroke is an interruption of the blood supply to part of the brain caused by either a blood clot (ischemic) or bleeding...
How the Heart Works
The heart is a very important organ in the body. It is responsible for continuously pumping oxygen and nutrient-rich blood...
Heart failure (congestive) is caused by many conditions including coronary artery disease, heart attack, cardiomyopathy, and...
Heart disease (coronary artery disease) occurs when plaque builds up in the coronary arteries, the vessels that supply blood to...
Hyperthyroidism is an excess of thyroid hormone resulting from an overactive thyroid gland. Symptoms can include increased...
An arrhythmia is an abnormal heart rhythm. With an arrhythmia, the heartbeats may be irregular or too slow (bradycardia), to...
Dizziness is a symptom that is often applies to a variety of sensations including lightheadedness and vertigo. Causes of...
Hemochromatosis (Iron Overload)
Hereditary hemochromatosis (iron overload) is an inherited disorder in which there is excessive accumulation of iron in the body....
Dehydration is the excessive loss of body water. There are a number of causes of dehydration including heat exposure, prolonged...
Fainting, also referred to as blacking out, syncope, or temporary loss of consciousness has many causes. Often a person will have...
Medical shock is a life-threatening medical condition. There are several types of medical shock, including: septic shock,...
Blood clots can occur in the venous and arterial vascular system. Blood clots can form in the heart, legs, arteries, veins,...
Low Potassium (Hypokalemia)
Potassium is an essential electrolyte necessary for cell function. Low potassium (hypokalemia) may be caused by diarrhea,...
Premature Ventricular Contractions (PVCs, PVC)
Premature ventricular contractions (PVCs, PVC) are premature heartbeats originating from the ventricles of the heart. PVCs are...
Pulmonary Embolism (Blood Clot in the Lung)
A pulmonary embolism (PE) occurs when a piece of a blood clot from deep vein thrombosis (DVT) breaks off and travels to an artery...
Hypercalcemia (Elevated Calcium Levels)
Hypercalcemia is a condition in which calcium levels in the blood are elevated. Hypercalcemia is associated with other conditions...
Nausea and Vomiting (Causes, Natural Remedies, Diet, Medication)
Nausea is an uneasiness of the stomach that often precedes vomiting. Nausea and vomiting are not diseases, but they are symptoms...
Orthostatic hypotension symptoms include: LightheadednessWeaknessBlurred vision Syncope or passing out Causes of...
Palpitations are uncomfortable sensations of the heart beating hard, rapidly, or irregularly. Some types of palpitations are...
Stress occurs when forces from the outside world impinge on the individual. Stress is a normal part of life. However,...
Heart attack happens when a blood clot completely obstructs a coronary artery supplying blood to the heart muscle. A heart attack...
Chest pain is a common complaint by a patient in the ER. Causes of chest pain include broken or bruised ribs, pleurisy,...
Aortic Valve Stenosis (Symptoms, Causes, Surgery)
Aortic valve stenosis is an abnormal narrowing of the aortic valve of the heart. The causes of aortic stenosis are wear and tear...
Stress and Heart Disease
The connection between stress and heart disease is not clear. Stress itself may be a risk factor, or high levels of stress may...
Sleep apnea is defined as a reduction or cessation of breathing during sleep. The three types of sleep apnea are central apnea,...
Heart Murmur (Symptoms, Sounds, Causes, Life Expectancy)
A heart murmur is the sound generated when blood flow within the heart is not smooth. Causes of heart murmurs can be functional,...
Mitral Valve Prolapse (MVP)
Mitral valve prolapse (MVP) is also also known as "click murmur syndrome" and "Barlow's syndrome." Mitral valve prolapse is the...
Atrial Fibrillation (AF, AFib)
Atrial fibrillation (AF or AFib) is an abnormality in the heart rhythm which involves irregular and often rapid beating of the...
Hyothermia or extreme exposure to cold can be classified as either accidental hypothermia (unintentional cold exposure) and...
Dilated Cardiomyopathy is a condition where the heart's ability to pump blood is decreased because the heart's main pumping...
Paroxysmal Supraventricular Tachycardia (PSVT)
Paroxysmal supraventricular tachycardia (PSVT) is an abnormal conduction of electricity in particular areas of the heart. PSVT...
Chagas Disease (American Trypanosomiasis or Kissing Bug Disease)
Chagas disease is an infection caused by the T. cruzi parasite. Symptoms of Chagas disease include rash, swollen lymph nodes,...
Sleepwalking is a condition in which an individual walks or does other activities while asleep. Factors associated with...
Sudden Cardiac Arrest
Sudden cardiac arrest is an unexpected, sudden death caused by sudden cardiac arrest (loss of heart function). Causes and risk...
Atrial flutter is a problem with the atria of the heart. In atrial flutter the atria of the heart rapidly and repeatedly beat...
Alpha thalassemia is a disorder in which the alpha globin protein is underproduced. There are two pairs of genes that carry the...
Learn about mitochondrial disease, genetic disease in which include a group of neuromuscular diseases that are caused by damage...
Wolff-Parkinson-White syndrome is a condition in which abnormal electrical pathways in the heart cause arrhythmias. Symptoms of...
Smoking (How to Quit Smoking)
Smoking is an addiction. More than 430,000 deaths occur each year in the U.S. from smoking related illnesses. Secondhand smoke or...
Loeys-Dietz syndrome is an inherited genetic syndrome characterized by aortic aneurysms in children. Children with Loeys-Dietz...
Heart Disease in Women
Heart disease in women has somewhat different symptoms, risk factors, and treatment compared to heart disease in men. Many women...
Congenital Heart Defects
Congenital heart defects are heart problems that are present at birth. Genetics may play a role in some heart defects. Symptoms...
Atrial Fibrillation vs. Ventricular Fibrillation (AFib vs VFib ECG Strips)
Atrial fibrillation (AFib) and ventricular fibrillation (VFib) are problems with the heart that cause abnormal heart rhythms....
Fitness: Exercise for a Healthy Heart
Regular exercise can help reduce the risk of heart disease. To achieve maximum benefits, do a mix of stretching exercise, aerobic...
Heart Attack Treatment
A heart attack involves damage or death of part of the heart muscle due to a blood clot. The aim of heart attack treatment is to...
Smoking and Heart Disease
Smoking increases the risk of heart disease in women and men. Nicotine in cigarettes decrease oxygen to the heart, increases...
Stroke is the third leading killer in the United States. Some of the warning signs of stroke include sudden confusion, trouble...
Heart Attacks in Women
Heart disease, particularly coronary artery disease is the leading cause of heart attacks. Women are more likely to die from a...
Heart Attack Pathology: Photo Essay
A heart attack is a layperson's term for a sudden blockage of a coronary artery. This photo essay includes graphics, pictures,...
Khat (Abyssinian tea, African salad, oat, kat, chat, and catha) is a flowering evergreen shrub native to East Africa and the...
Restrictive cardiomyopathy, the rarest form of cardiomyopathy, is a condition in which the walls of the lower chambers of the...
Omega-3 Fatty Acids (Benefits, Uses, Foods)
Omega-3 fatty acids are essential fats that help decrease one's cholesterol and triglyceride levels as well as reduce the risk of...
Heart Attack Prevention
Heart disease and heart attacks can be prevented by leading a healthy lifestyle with diet, exercise, and stress management....
Regular physical activity can reduce the risk of disease. Regular exercise can also reduce the symptoms of stress and anxiety....
Biologic rhythms, or biorhythms, are how our bodies respond to the regular phases of the sun, moon, and seasons. A medical...
Heart Disease Treatment in Women
Heart disease treatment in women should take into account female-specific guidelines that were developed by the American Heart...
Heart Attack vs. Stroke Symptoms, Differences, and Similarities
Heart attack usually is caused by a clot that stops blood flow supplying oxygen to an area of heart muscle, which results in...
Heart Attack Prevention Overview
Heart attacks are the major causes of unexpected, sudden death among men and women. A heart attack also is a significant cause...
Heart Rhythm Disorders - Type of Disorder
Please describe what type of heart rhythm disorder you have.Post View 72 Comments
Abnormal Heart Rhythms - Treatments
How was your heart rhythm disorder treated?Post View 18 Comments
Abnormal Heart Rhythms - Diagnosis
How was your heart rhythm disorders diagnosed?Post View 4 Comments
Heart Rhythm Disorders - Symptoms
What symptoms do you experience with your heart rhythm disorder?Post View 2 Comments
Heart Rhythm Disorders - A-fib
How do you manage your atrial fibrillation?Post
Local ResourcesFind a local Cardiologist in your town
Treatment & Diagnosis
Medications & Supplements
- Beta Blockers (Drug Class, List of Brand and Generic Names)
- metoprolol (Lopressor, Toprol XL)
- Angiotensin II Receptor Blockers (ARBs)
- Aldactone (spironolactone)
- Calcium Channel Blockers (CCBs)
- Anticoagulants (Anticoagulant Drug Class)
- Nitrates (Medication)
- digoxin (Lanoxin, Lanoxin Pediatric)
- apixaban (Eliquis)
- carvedilol (Coreg, Coreg CR)
- propranolol, Inderal, Inderal LA, Innopran XL
- erythromycin, Ery-Tab, PCE
- lidocaine injection (Xylocaine)
- amiodarone, Cordarone, Nextrone, Pacerone
- diltiazem (Cardizem, Cardizem CD, Cardizem LA, Tiazac, Cartia XT, Diltzac, Dilt-CD, and several oth)
- Beta Blocker Side Effects (Adverse Effects)
- propafenone (Rythmol, Rythmol SR)
- atropine (oral, Atreza, Sal-Tropine - discontinued in the US)
- magnesium sulfate (injection)
- nadolol (Corgard)
- phenylephrine hydrochloride (NeoSynephrine, Neofrin)
- quinidine (Discontinued Brands: Cardioquine, Cin-Quin, Duraquin, Quinidex, Quinora, Quinact)
- Sectral (acebutolol)
- procainamide, Pronestyl; Procan-SR; Procanbid (These brands no longer are available in the U.S.)
- atenolol and chlorthalidone, Tenoretic
- timolol (Blocadren and Timolide 10-25 have been discontinued)
Prevention & Wellness
- Avoiding Alcohol Helps the Heart Beat Better
- Undiagnosed Heart Condition 'AFib' May Be Common, Study Suggests
- Lifesaving Drugs From Pfizer in Short Supply: FDA
- Oktoberfest Study Links Boozing to Heart Woes
- Heart Devices 101: Guide to the Tools That Keep You Ticking
- Beta Blockers May Not Be Best Heart Drugs for Dementia Patients
- Many With Common Irregular Heartbeat Unaware of Stroke Risk
- Marijuana Use Tied to Rare, Temporary Heart Malfunction
- No Link Between Caffeine, Irregular Heartbeat in Heart Failure Patient Study
- Message for Heart Failure Patients: Exercise
- Women in Cardiac Arrest May Be Less Likely to Receive Help
- Weight Loss May Help Control Common Irregular Heartbeat
- Botox Might Prevent Irregular Heartbeat After Bypass Surgery
- Implanted Defibrillators Restore Healthy Heart Function to Many: Study
- Test Endurance Athletes for Heart Woes While They Exercise: Study
- Device May Pose Dangers for Patients With Irregular Heartbeat: Study
- 'Wireless' Pacemaker Working Well So Far, Researchers Say
- Scientists Spot How Bacterial Pneumonia Damages the Heart
- Heart Medication Digoxin Linked to Higher Risk of Death for Some
- Pacemakers Common for Those With Dementia and Irregular Heartbeats
- Scientists Use Gene Therapy to Create 'Biological Pacemaker' in Pig Hearts
- Low Blood Sugar May Affect Heartbeat in People With Diabetes
- Whites at Highest Risk for Irregular Heart Rhythm, Study Finds
- FDA Sets Rules for Smartphone Medical Apps
- New Defibrillator Works Without Wires Touching Heart
- Fish Oil Supplements Don't Protect Against Heart Trouble: Study
- Common Heart Meds May Boost Recovery From Non-Cardiac Surgeries
- Higher Heart Rate Tied to Earlier Death, Even in Fit People
- Study Links Stillbirth to Genes Tied to Dangerous Heart Rhythm
- Energy Drinks Linked to Changes in Heart Rhythm
- FDA Renews Heart-Risk Warning for Antibiotic
- Yoga May Help With Common Heart Rhythm Disorder
- Implanted Defibrillator Patients Prefer Device Off if Very Ill: Survey
- Antidepressants Celexa, Lexapro Tied to Irregular Heartbeat: Study
- ER Visits Linked to Energy Drinks Double: Report
- Overactive Thyroid May Raise Risk for Common Irregular Heartbeat
- Device Offers Hope for Battery-Free Pacemakers
- Heart Attacks, Strokes Jumped After Japan Earthquake, Study Finds
- Survival More Likely With Exercise-Related Cardiac Arrest: Study
- Close Relative's Early Death May Raise Your Heart Risk: Study
- Implantable Defibrillators Linked to Decline in Cardiac Arrests
- Health Tip: Living With a Pacemaker
- Coffee in Moderation May Lower Heart Failure Risk
- FDA Rejects New Use for Blood Thinner Xarelto
- Can Too Much Exercise Be Harmful?
- Heart Rhythm Disorder May Raise Older Women's Stroke Risk
- Palpitations May Signal Future Heart Rhythm Problem
- Black Africans Less Apt to Develop Heart Rhythm Disorder Than Whites
- Tasers Can Trigger Fatal Heart Trouble: Study
- Stopping Blood Thinners Raises Stroke Risk for Patients With Irregular Heartbeat
- Pacemakers, Defibrillators Sources of Deadly Infections: Study
- Could Caffeine Help Dry Eye?
- Incontinence Drugs: Benefits and Harms Compared
- FDA Adds More Warnings to Antidepressant's Label
- Defibrillator Implantation May Be Riskier for Underweight Patients
- Family Tree May Aid Treatment of Inherited Heart Disorders
- Study Links 'Body Clock' to Sudden Cardiac Death
- Even When Silent, Irregular Heartbeat Linked to Stroke Risk
- Handheld Metal Detectors Don't Seem to Affect Pacemakers: Study
- Home Monitoring of Heart Device May Be Safe
Subscribe to MedicineNet's Heart Health Newsletter