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COPYRIGHT©2018. LOS ANGELES CAREER COLLEGE. ALL RIGHTS RESERVED.
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Monomorphic Ventricular Tachycardia Causes Lack of oxygen to the heart due to tissue damage from heart disease Abnormal electrical pathways in the heart present at birth (congenital heart conditions, including long QT syndrome) Structural heart disease (cardiomyopathy) Medication side effects An inflammatory disease affecting skin or other tissues (sarcoidosis) Abuse of recreational drugs, such as cocaine Imbalance of electrolytes, mineral-related substances necessary for conducting electrical impulses COPYRIGHT©2018. LOS ANGELES CAREER COLLEGE. ALL RIGHTS RESERVED.
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Monomorphic Ventricular Tachycardia Characteristics COPYRIGHT©2018. LOS ANGELES CAREER COLLEGE. ALL RIGHTS RESERVED. Atrial rate Obscured Ventricular rate Regular; R to R intervals are regular, more than 150 bpm P waves Obscured QRS Wide and bizarre, unchanged unless aberrant conduction due to premature beat or increased rate Intervals PR: absent QRS: more or equal 0.12 sec
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Polymorphic Ventricular Tachycardia COPYRIGHT©2018. LOS ANGELES CAREER COLLEGE. ALL RIGHTS RESERVED.
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Polymorphic Ventricular Tachycardia Overview Monomorphic ventricular arrhythmias have a regular rate and rhythm and QRS complexes have a uniform shape. Polymorphic ventricular arrhythmias are typically irregular in rate and rhythm and the QRS complexes vary in shape. Polymorphic VT is usually unstable and may deteriorate into VF. Polymorphic ventricular tachycardia (PVT) is a form of ventricular tachycardia in which there are multiple ventricular foci with the resultant QRS complexes varying in amplitude, axis and duration. 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. For TdP to be diagnosed, the patient has to have evidence of both PVT and QT prolongation. COPYRIGHT©2018. LOS ANGELES CAREER COLLEGE. ALL RIGHTS RESERVED.
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Polymorphic Ventricular Tachycardia Causes The commonest cause of PVT is myocardial ischaemia Abnormal electrical pathways in the heart present at birth (congenital heart conditions, including long QT syndrome) Structural heart disease (cardiomyopathy) Medication side effects An inflammatory disease affecting skin or other tissues (sarcoidosis) Abuse of recreational drugs, such as cocaine COPYRIGHT©2018. LOS ANGELES CAREER COLLEGE. ALL RIGHTS RESERVED.
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Polymorphic Ventricular Tachycardia Characteristics Atrial rate Obscured Ventricular rate
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  • Fall '19
  • Cardiology, Cardiac arrest, ventricular tachycardia, Ventricular fibrillation

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