Palpitations and arrhythmias
- Arrhythmia links (2)
- Arrhythmias - Quick Primer (2)
- Atrial fibrillation
- Bundle branch block (4)
- Pacemakers and defibrill...
- Syncope (fainting)
How Did You Decide About Amiodarone?
The decision to take amiodarone is often a difficult one, given the remarkable effectiveness of the drug on one hand, and on the other, its difficult side effect profile. Share the process you and your doctor went through when you decided whether to take amiodarone.
The Implantable Defibrillator
An implantable defibrillator (ICD) is an implantable device that monitors a person's heart rhythm, and automatically delivers lifesaving treatment if a dangerous heart arrhythmia occurs.
How Does Having an Implantable Defibrillator Affect Your Lifestyle?
Several lifestyle considerations, including driving recommendations, need to be taken into account if you are considering an implantable defibrillator (ICD).
Should You Get an Implantable Defibrillator?
If you have an increased risk of sudden death, you should consider an implantable defibrillator (ICD).
Sudden Death in Young Athletes
Sudden death in young athletes, fortunately a rare event, can be caused by several kinds of underlying cardiac conditions.
What Turned Out To Be the Cause of Your Palpitations?
Tell us what turned out to be the cause of your palpitations
The Electrophysiology Study
A description of the electrophysiology study.
Bradycardia - Slow Heart Rhythms
Bradycardias, or slow heart rhythm disturbances, can be caused either by disorders of the sinus node, or of the AV conducting system including the AV node, His bundle, and bundle branches.
Brugada Syndrome - Exercise Recommendations
Brugada syndrome can cause sudden death during exercise. Here are current exercise recommendations for individuals with Brugada syndrome.
Premature Atrial Complexes (PACs)
PACs, or premature atrial complexes, are the most common of the heart arrhythmias.
Tachycardias - Fast Heart Arrhythmias
Tachycardias are fast heart rhythm disturbances. They are categorized as either the supraventricular tachycardias or ventricular tachycardia.
Diagnosing Cardiac Arrhythmias
Diagnosing cardiac arrhythmias usually requires recording the heart rhythm until symptoms occur. Sometimes an electrophysiology study is helpful.
Exercise Recommendations For Arrhythmogenic Right Ventricular Cardiomyopathy
Exercise recommendations for people with arrhythmogenic right ventricular cardiomyopathy (ARVC)
Cardiac arrest occurs when the heart stops beating, usually as a consequence of ventricular tachycardia or fibrillation. Unless cardiac circulation is restored within a few minutes with a defibrillator, sudden death ensues.
Medications for Heart Arrhythmias
The antiarrhythmic drugs can be useful in treating cardiac arrhythmias, but are often difficult to use safely.
Heart Attack vs. Cardiac Arrest
A cardiac arrest is not the same thing as a heart attack. Here is the difference.
Ablation Therapy for Cardiac Arrhythmias
Ablation procedures treat abnormal electrical pathways in the heart. These procedures can sometimes eliminate certain heart arrhythmias.
Drugs that Prolong QT Interval Cause 3-Fold Increase in Risk
Non-cardiac drugs that prolong the QT interval produce a 3-fold increase in sudden death
Living With Cardiac Arrhythmias
Articles on cardiac arrhythmias and their treatment.
Exercise and atrial fibrillation
How exercise can help to prevent atrial fibrillation
IST - Inappropriate Sinus Tachycardia
Inappropriate sinus tachycardia (IST) is a fairly common cause of tachycardia and palpitations.
A discussion of palpitations - one of the most common symptoms related to heart problems
Amiodarone is the most powerful antiarrhythmic drug, but may be the most toxic.
Anxiety after implantable defibrillators
How to manage anxiety after placement of an ICD
Long QT Syndrome
A review of long QT syndrome - a relatively common and potentially fatal arrhythmia
PVCs - premature ventricular complexes
Premature ventricular complexes: one of the most common cardiac arrhythmias, and one of the most difficult to treat.
The Cardiac Electrical System -- How the Heart Beats
The cardiac electrical system controls the heart rate and coordinates the contraction of cardiac muscle.
Drugs that Treat Cardiac Arrhythmias
Here's what you need to know about antiarrhythmic drugs and medications.
Supraventricular Tachycardia (SVT)
Supraventricular tachycardia, or SVT, is a category of cardiac arrhythmias characterized by a heart rate that is too fast.
Sinus Nodal Reentrant Tachycardia (SNRT)
Sinus nodal reentrant tachycardia (SNRT) is a type of supraventricular tachycardia that arises from the sinus node.
Wolff-Parkinson-White Syndrome (WPW)
Wolff-Parkinson-White syndrome (WPW) is a cardiac condition which produces supraventricular tachycardia (SVT) and characteristic changes on the ECG.
Atrioventricular Reciprocating Tachycardia (AVRT)
Atrioventricular reciprocating tachycardia (AVRT) one of the more common varieties of supraventricular tachycardia (SVT).
Intra-atrial Reentrant Tachycardia (IART)
Intra-atrial reentrant tachycardia (IART) is an uncommon variety of supraventricular tachycardia (SVT).
Atrioventricular Nodal Reentrant Tachycardia (AVNRT)
Atrioventricular nodal reentrant tachycardia (AVNRT) is the most common cause of supraventricular tachycardia (SVT).
Types of Supraventricular Tachycardia (SVT)
A review of the supraventricular tachycardias (SVT), a group of heart arrhythmias that originate in the atrial chambers of the heart.
Brugada syndrome is an uncommon congenital abnormality in the heart's electrical system that can cause ventricular fibrillation and sudden death.
Arrhythmogenic Right Ventricular Cardiomyopathy (ARVC)
Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a type of cardiac arrhythmia caused by a genetically-mediated heart muscle disease.
Automatic tachycardias are fast, abnormal heart rhythms caused by the rapid production of electrical signals within the heart.
Reentrant tachycardias are a form of rapid heart arrhythmias that usually start and stop quite suddenly.
An accessory pathway is an abnormal, extra electrical connection in the heart, present from birth, which connects one of the atria with one of the ventricles.
Bradycardia means a slow heart rate, specifically, a heart rate slower than 60 beats per minute.
The sinus node is a nest of specialized cells, located in the upper part of the heart's right atrium, that controls the normal heart rate.
Atrioventricular Node (AV Node)
The atrioventricular Node, or AV node, is a key part of the heart's electrical system. The AV node helps transmit the heart's electrical impulse from the atria to the ventricles.
A bradyarrhythmia is an abnormally slow heart rhythm, usually due to disease in the heart's electrical system.
A tachyarrhythmia is an abnormal heart rhythm that results in a rapid heart rate.
Tachycardia means that your heart is beating faster than normal -- specifically, a heart rate faster than 100 beats per minute.
An arrhythmia is an abnormal heart rhythm.
Repetitive Monomorphic Ventricular Tachycardia (RMVT)
Repetitive monomorphic ventricular tachycardia (RMVT) is one of the rare types of ventricular tachycardia seen in younger people with no apparent heart disease.
Ventricular fibrillation is the most dangerous of the cardiac arrhythmias.
Ventricular tachycardia is a potentially life-threatening, rapid heart rhythm disturbance that originates in the ventricles.
Non-Sustained Ventricular Tachycardia - NSVT
Non-sustained ventricular tachycardia (NSVT) is an episode of ventricular tachycardia that stops by itself after a few seconds. NSVT can cause significant symptoms, and can indicate an increased risk for cardiac arrest and sudden death.
Treatment of Premature Ventricular Complexes - PVCs
The treatment of premature ventricular complexes - PVCs - depends on the symptoms they are causing, and on any associated underlying heart disease.
Heart block, or AV block, is one of the two major causes of bradycardia (slow heart rate). Pacemakers are often used in heart block to treat or prevent symptoms.
In sinus bradycardia, a slow heart rate occurs because the heart's sinus node is generating the electrical signals that regulate the heart rhythm at a relatively reduced rate. Sometimes sinus bradycardia is normal, but at other times it requires treatment.
Sick Sinus Syndrome
In sick sinus syndrome, bradycardia caused by sinus node disease is pronounced enough to produce symptoms. Atrial fibrillation also frequently occurs.
Normal Sinus Rhythm - NSR
Normal sinus rhythm (NSR) is another name for the normal heart rhythm.
Cardiac Risk With Azithromycin (Zithromax Z-Pack)
Azithromycin (Z-Pack) may produce an increased risk of sudden death in some people.
The QT interval reflects the time necessary to prepare a cardiac cell to produce a cardiac impulse once the previous cardiac impulse occurs.
Cardioversion is a procedure that stops a rapid cardiac arrhythmia, usually with an electrical shock.
Subsidiary Pacemaker Cells
Subsidiary pacemaker cells take over the control of the heart rhythm if the sinus node should become diseased, or if heart block should occur.