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SVT

This document discusses supraventricular tachycardia (SVT), which are tachyarrhythmias originating from the atria or atrioventricular node that cause a rapid heart rate. SVTs are classified as either atrial or AV tachyarrhythmias based on their site of origin. Common causes include inherited conditions, structural heart abnormalities, coronary artery disease, and hyperthyroidism. Diagnosis involves an electrocardiogram (ECG), Holter or event monitor, exercise test, or electrophysiology study. Treatment depends on whether it is acute or long term, and may include vagal maneuvers, calcium channel blockers, cardioversion, or medications like digoxin, beta blockers,

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BY: MOHAMMED AHMED RAJAB
 SVT any tachyarrhythmia that requires atrial and/or atrioventricular (AV) nodal tissue for its initiation and maintenance and - Narrow-complex tachycardia - Regular, rapid rhythm
▪ Depending on the site of origin of the dysrhythmia, SVTs may be classified as an atrial or AV tachyarrhythmia. Atrial tachyarrhythmias (1) Sinus Tachycardia. (2) Inappropriate Sinus Tachycardia (IST). (3) Sinus Nodal Reentrant Tachycardia (SNRT). (4) Atrial Tachycardia. (5) Multifocal Atrial Tachycardia. (6) Atrial Flutter. (7) Atrial Fibrillation. AV tachyarrhythmias (1) AV nodal reentrant tachycardia (AVNRT). (2) AV reentrant tachycardia (AVRT). (3) Junctional ectopic tachycardia (JET). (4) Non-paroxysmal junctional tachycardia (NPJT).
▪ Usually in mild SVT being asymptomatic. ▪ S & S: ▪ Palpitation. ▪ Dizziness. ▪ Chest pain. ▪ Shortness of Breathing. ▪ Tiredness (Fatigue). ▪ Sweating. ▪ Nausea.
▪ Inherited Conditions. ▪ Structural Abnormalities. ▪ Coronary Artery Disease. ▪ COPD. ▪ Pulmonary Embolism. ▪ Hyperthyroidism. ▪ Alcoholism.
 Electrocardiogram (ECG, EKG)—a test that records the heart’s activity by measuring electrical currents through the heartmuscle  Holter monitor or event monitor—an ambulatory monitor to record your heart rhythm that can be worn from 1-30 days to detect arrhythmias and correlate symptoms with the heart rhythm  Exercise test—particularly if the symptoms occur during physical activity  Electrophysiology study—an invasive test where monitoring wires are placed inside the heart and the heart's conduction system is tested directly  Cardiac catheterization —a tube-like instrument inserted into the heart through a vein or artery (usually in the arm or leg) to detect problems with the heart and its blood supply
▪ Acute setting ▪ Vagal Maneuver. ▪ Calcium channel blocker: terminate in 2 minutes. ▪ DC cardioversion 10-50 J ▪ Long term management ▪ Medication: ▪ Digoxin. ▪ Beta blocker. ▪ Calcium channel blocker.
SVT