Back to Course
Basics of ECG Interpretation11 Topics
Normal ECG Parameters
ECG Interpretation of Chamber Enlargement4 Topics
Heart Block3 Topics
Sick Sinus Syndrome
Low Amplitude QRS Complex
Wide QRS Complex
Bundle Branch Block
Differentials for ECG Abnormalities
Lesson 8, Topic 3
- A run of at least 4 supraventricular premature beats in a row (see above).
- Often occurs as paroxysms (bursts).
Etiology: The same as for supraventricular premature beats (see above)
Consequences: Paroxysms of supraventricular tachycardia can result in weakness, syncope, and heart failure when sustained and untreated
- Efforts to increase the parasympathetic tone and thereby reduce A-V nodal conduction may be useful in slowing the ventricular response, assisting in detecting atrial activity (P waves on ECG), and differentiating supraventricular tachycardia from ventricular tachycardia. This may be accomplished by:
- Vagal maneuvers such as ocular pressure or carotid sinus massage
- Reflex induced increase in vagal tone using phenylephrine
- Anti-arrhythmics including beta blockers (e.g. propranolol, metoprolol, atenolol), calcium channel blockers (diltiazem), sotalol, or digoxin.