Supraventricular Tachycardia (SVT)

A young male visited the outpatient department, reporting palpitations. Previously diagnosed with asthma three years ago, he currently uses inhaled corticosteroids and beta agonists. During examination, his blood pressure is 110/70 mmHg, and his pulse is 130/min, regular. An ECG revealed narrow complex tachycardia, and attempts at vagal maneuvers proved unsuccessful in restoring the normal rhythm. What is the next most suitable course of action?

A 22-year-old male visited the outpatient department, reporting sudden palpitations. He denied experiencing shortness of breath, chest pain, nausea, vomiting, or diaphoresis. During examination, his pulse rate was 155/min, blood pressure was 120/85 mmHg, and precordial and chest examinations revealed no abnormalities. An ECG showed narrow complex tachycardia, and attempts at vagal maneuvers proved unsuccessful. What is the most suitable next step?

A 30-year-old female presented with palpitations. An ECG revealed narrow complex tachycardia with a heart rate of 190/min, and her blood pressure was within normal range. Following unsuccessful vagal maneuvers, IV adenosine 6 mg was administered, but she did not revert to normal rhythm. What is the next most appropriate course of action?

A middle-aged man presented with palpitations. During examination, he exhibited a pulse rate of 140/min. The ECG revealed tachycardia with wide QRS complexes, and there were no indications of a pre-existing or rate-related bundle branch block. What is the likely possibility among the following?

A 40-year-old school female presented with a three-hour history of sudden-onset palpitations and light-headedness. The episode started while she was walking briskly in a park. She has no prior history of cardiovascular disease, thyroid disease, or stimulant use.

On examination: blood Pressure: 122/76 mmHg, respiratory Rate: 18/min, afebrile, oxygen Saturation: 98% on room air. She is alert, oriented, and in no distress.

12-lead ECG: Regular narrow-complex tachycardia at 170 bpm. Retrograde P-waves are noted in the inferior leads. No flutter waves are present. Normal serum electrolytes, creatinine, and negative troponin. What is the most appropriate initial management for this patient?