What is the difference between torsades de pointes and ventricular fibrillation?

What is the difference between torsades de pointes and ventricular fibrillation?

TdP is an unusual type of tachycardia that sometimes resolves on its own, but can also worsen into a serious heart condition called ventricular fibrillation. Ventricular fibrillation can lead to cardiac arrest, an event in which the heart suddenly stops. Cardiac arrest is usually fatal.

Can torsades lead to VFIB?

Most cases of torsades de pointes resolve on their own without treatment. However, it can develop into ventricular fibrillation, which can lead to cardiac arrest and may even be fatal.

Is torsades the same as Vtach?

Polymorphic ventricular tachycardia Defined as ventricular tachycardia with varying QRS amplitude. This is commonly referred to as torsade de pointes, but it’s actually not the same thing.

Do you defibrillate torsades?

Pulseless torsades should be defibrillated. Intravenous magnesium is the first-line pharmacologic therapy in Torsades de Pointes. Magnesium has been shown to stabilize the cardiac membrane, though the exact mechanism is unknown. The recommended initial dose of magnesium is a slow 2 g IV push.

Why does QT prolongation cause torsades?

In the long QT syndromes (LQTS), malfunction of ion channels impairs ventricular repolarisation and triggers a characteristic ventricular tachyarrhythmia: torsade de pointes. Symptoms in the LQTS (syncope or cardiac arrest) are caused by this arrhythmia.

How do you identify torsades de pointes on an ECG?

Torsades de pointes is a specific form of polymorphic ventricular tachycardia in patients with a long QT interval. It is characterized by rapid, irregular QRS complexes, which appear to be twisting around the electrocardiogram (ECG) baseline.

Is amiodarone contraindicated in torsades?

Torsades de pointes is caused by a prolonged QT. Almost all of the antiarrhythmics that we normally use to treat ventricular tachycardia, such as amiodarone and procainamide, will prolong the QT further, and therefore can make your patient worse. Do not give amiodarone or procainamide.

Does a pacemaker prevent torsades?

The pacemaker component of such devices should in theory help prevent torsades by preventing bradycardia. However, the rate of most pacemakers is not likely to provide protection from torsades.

Why would you not want to give amiodarone to a patient with torsades?

What drugs can cause torsades?

The list of drugs known to cause TdP that require a dose adjustment for patients with acute kidney injury or chronic kidney disease include: ciprofloxacin, disopyramide, dofetilide, flecainide, fluconazole, levofloxacin, procainamide, and sotalol.

What is torsades de pointe?

Torsades de Pointes is a specific type of ventricular tachycardia, or fast heart rhythm that begins in your heart ventricles. You can get it if you inherited Long QT syndrome or if you take certain medicines.

What characteristic is seen with torsades de pointes arrhythmia?