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Premature Ventricular contractions (video)

Premature ventricular contractions (PVC’s), the lower chambers of the heart contract without receiving the appropriate signal from the upper chambers of the heart. This causes the ventricles to contract prematurely, which..

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Implantable cardioverter defibrillator (ICD)

 Pierluigi Incarnato,  TFCPC Cardiovascular and Abdominal Techinician Sonographer, Cardiac Physiologist at San Michele Nursing Home (Italy)    

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Implantable Cardioverter Defibrillator (video)

Implantable Cardioverter Defibrillator, or ICD , is a battery-powered device that keeps track of your heartbeat and can deliver an electrical shock that will allow ventricular muscle fibrillation to return..

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Electrical conduction system of the Heart (video)

The impulse starts at the sinoatrial node (SA node) the hearts natural pacemaker.⠀ ⠀ The impulse travels through the internodal pathways to the atrioventricular node (AV node). ⠀ From the..

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Atrial fibrillation (video)

Atrial fibrillation (AF), a type of irregular heartbeat. Having AF means that blood clots are more likely to form in your heart, increasing your risk of stroke. Atrial Fibrillation is..

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RVOT Ventricular Tachycardia (video)

RVOT Ventricular Tachycardia, During Right Ventricular Outflow Tract (R.V.O.T.) Ventricular Tachycardia, abnormal signals originate in the right ventricle near the pulmonary valve, also known as the right ventricular outflow tract...

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Bradycardia (video)

Bradycardia is a type of heart arrhythmia. In bradycardia, the heartbeat is slow, less than sixty beats per minute. It may be caused by a problem with the pacemaker of..

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Atrioventricular Nodal Reentry Tachycardia (video)

Atrioventricular Nodal Reentry Tachycardia, or AVNRT , is a type of heart arrhythmia, or irregular heartbeat. The most common type of SVT is AVNRT. In AVNRT, electrical signals reenter the..

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Ventricular Tachycardia (video)

Ventricular Tachycardia is a heart arrhythmia, or irregular heartbeat. In ventricular tachycardia, abnormal electrical pulses in the lower chambers, or ventricles, disrupt the normal firing of the SA node, causing..

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Sinus Tachycardia (video)

The heartbeat is controlled by the electrical system of the heart. This system is made of several parts that tell the muscle of the heart when to contract. The SA..

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Sudden Cardiac Arrest (video)

Sudden cardiac arrest (SCA) is an event caused by a problem with the heart’s “electrical” system. SCA occurs when the heart suddenly stops beating. The heart’s electrical system sends signals to..

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Supraventricular Tachycardias (video)

Supraventricular Tachycardias include a group of heart arrhythmias, or irregular heartbeats that originate in the atria. In each of these conditions, electrical signals begin in the atria, sending abnormal signals..

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Pauses and Their Connection to the P-P Intervals Part 2

Overdrive Suppression We have here in Figure 1 what is most likely an AV nodal reentrant tachycardia (AVNRT). Could it possibly be an AV reentrant tachycardia with orthodromic conduction through..

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Pauses and Their Connection to the P-P Intervals - Part 1

Often we come upon pauses on 12-lead ECGs and rhythm strips. Some of these pauses have durations that we are simply unable to justify while others are easier to comprehend...

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Electrophysiological Manifestations of Cardiac Amyloidosis

Abstract Cardiac amyloidosis (CA) is an infiltrative cardiomyopathy caused by the extracellular deposition of amyloid fibrils in the myocardium. Although cardiac amyloidosis patients primarily present with heart failure symptoms, arrhythmias..

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Understanding AV Blocks

One of the first things I try to teach the participants in my classes is the meaning of the term atrioventricular block – commonly abbreviated as “AV block.” So many..

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