How do you approach SVT?
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How do you approach SVT?
Valsalva maneuvers are effective in terminating SVT in hemodynamically stable patients. Intravenous adenosine, verapamil, and diltiazem are effective in acute termination of SVT. Beta blockers (metoprolol, atenolol, propranolol, and esmolol) are effective in acute termination of SVT.
What is the criteria for SVT?
Supraventricular tachycardia (SVT) is a dysrhythmia originating at or above the atrioventricular (AV) node and is defined by a narrow complex (QRS < 120 milliseconds) at a rate > 100 beats per minute (bpm).
What are examples of tachyarrhythmias?
Examples of tachyarrhythmia include:
- Multifocal atrial tachycardia.
- Paroxysmal atrial tachycardia.
- Paroxysmal supraventricular tachycardia.
- Sinus tachycardia.
- Ventricular tachycardia.
- Atrial fibrillation.
- Atrial flutter.
How are tachyarrhythmias classified?
Tachyarrhythmia is defined as a heart rhythm with a ventricular rate of 100 beats/min or greater. Tachyarrhythmias are broadly categorized as narrow complex tachycardia (NCT; < 120 ms) or wide complex tachycardia (≥ 120 ms).
What is reentry mechanism?
Reentry, due to a circuit within the myocardium, occurs when a propagating impulse fails to die out after normal activation of the heart and persists as a result of continuous activity around the circuit to re-excite the heart after the refractory period has ended; it is the electrophysiologic mechanism responsible for …
What is re entry phenomenon?
Cardiology The reexcitation of a region of the heart by a single electrical impulse, which may cause ectopic beats or tachyarrhythmia; RE is the common cause of paroxysmal atrial or supraventricular arrhythmia, which is coupled to premature ventricular depolarization.
What is the best drug for SVT?
Adenosine is the first-line medical treatment for the termination of paroxysmal SVT.
What is the difference between tachycardia and arrhythmia?
An arrhythmia is a problem with the rate or rhythm of your heartbeat. It means that your heart beats too quickly, too slowly, or with an irregular pattern. When the heart beats faster than normal, it is called tachycardia.
What causes re entry?
What is early Afterdepolarization?
An early after/depolarization (EAD) is an abnormality of the repolarization process of an action potential which causes an interruption or a retardation of normal repolarization.
