TACHYARRHYTHMIAS PSVT Paroxysmal supraventricular Tachycardia DIAGNOSIS with Treatment
SINUS TACHYCARDIA —
- Heart rate exceeds 100 beats/min
- Gradual onset and offset
- Normal PQRST.
PSVT Proxysmal supraventricular Tachycardia —
Features of PSVT
- There is sudden onset and offset of very fast regular heart beats (120 – 250 beats per minute) with palpitations and sometime dizziness, discomfort, and altered consciousness.
- It may subside after a few minutes to a few hours spontaneously or with treatment.
- When it subsides suddenly the patient feels urge to pass urine and micturates frequently.
- Patient feels normal after the attack.
- The frequency of attacks of PSVT is very variable.
Clinical features of PSVT —
- ·Palpitations
- Syncope
- Acute pulmonary oedema
- Heart failure
- Hypotension
Treatment of PSVT
- Carotid sinus massage
- For hypotension – IV phenylephrine – 0.1 mg in increasing doses Verapamil 2.5 – 10 mg IV
- Adenosine 6-12 mg IV
- Beta blockers
- Digitalis
- Atrial or ventricular pacing DC cardioversion
- Radio frequency catheter ablation of AV node.