Microbiology 3-4 months baby with hea rate 250/min, QRS complex less than 0.07 sec and no P wave, Diagnosis will be A SVT B Sinus tachycardia C PSVT with block D VT 💡 Explanation 3-4 months baby with hea rate 250/min, QRS complex less than 0.07 sec and no P wave, Diagnosis will be ✓ Correct Answer: A. SVT