As a medical professional with expertise in cardiology, I can provide you with an informed explanation of the causes of polymorphic ventricular tachycardia (PVT). Polymorphic ventricular tachycardia is a type of abnormal heart rhythm characterized by rapid and chaotic heartbeats that originate in the ventricles, the lower chambers of the heart.

**Causes of Polymorphic Ventricular Tachycardia:**


1. Underlying Heart Conditions: PVT can be a complication of various heart diseases, including coronary artery disease, cardiomyopathy, and congenital heart defects.


2. Electrolyte Imbalances: Imbalances in the body's electrolytes, particularly potassium, magnesium, and calcium, can lead to PVT.


3. Drug-Induced: Certain medications, such as certain antiarrhythmic drugs, can trigger PVT, especially when they are used inappropriately or in combination with other drugs.


4. Long QT Syndrome: This is a genetic disorder that affects the heart's electrical activity and can lead to PVT.


5. Commotio Cordis: A rare cause, this is a sudden impact to the chest that can disrupt the heart's rhythm and cause PVT.


6. Brugada Syndrome: Another genetic condition that affects the heart's electrical system and can result in PVT.

7. **Acute Myocardial Infarction (Heart Attack):** Damage to the heart muscle from a heart attack can lead to PVT.

8.
Other Factors: Stress, excessive alcohol consumption, and certain medical conditions like hypothyroidism can also contribute to the development of PVT.

It's important to note that PVT is a serious medical condition that requires immediate attention. If you or someone you know is experiencing symptoms suggestive of PVT, seek emergency medical care.

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The commonest cause of PVT is myocardial ischaemia. Torsades de pointes (TdP) is a specific form of polymorphic ventricular tachycardia occurring in the context of QT prolongation; it has a characteristic morphology in which the QRS complexes ��twist�� around the isoelectric line.read more >>