Narrow Complex Supraventricular Tachycardias

Question 1

What is sinus tachycardia?

Answer 1

Sinus rhythm with RHR >100 in adults or above the normal range in children.

Question 2

Pharmacological causes of sinus tachycardia?

Answer 2

Beta- agonists, sympathomimetics, anti-muscarinics, caffeine, theophylline, marijuana.

Question 3

Non- pharmacological causes of sinus tachycardia?

Answer 3

Hypovolemia, hyperthyroidism, sepsis, pyrexia, anaemia, acidemia, hypercarbia, hypoxia, pulmonary embolism, cardiac tamponade, alcohol withdrawal etc.

Question 4

Camel hump appearance in sinus tachycardia?

Answer 4

It is the camel hump like appearance of P waves in sinus tachycardia with very fast HR. For instance: 150 BPM