Aim This case report aimed to highlight the symptoms and emphasis the importance of Paroxysmal Supraventricular tachycardia in infancy.

Material and Method Supraventricular tachycardia (SVT) is a common condition that occurs at any age, and is the most common rhythm disturbance in children. Most of the clinically important Supraventricular tachycardia in healthy children is caused by the presence of an accessory electrical connection between the atrium and the ventricle or within the atrioventricular node. Incidence is estimated to be 1 in 250 healthy children. The vast number are paroxysmal, characterized by sudden onset and termination. In older children clinical presentations are: palpitations, dizziness, shortness of breath, syncope, chest pain, fatigue, diaphoresis, nausea. In infants, symptoms are mostly nonspecific and include poor feeding, irritability, vomiting, cyanosis, and pallid spells.

Results A 3-months old male was brought to the emergency as he had experienced a vomiting episode which was followed by pallor and unresponsive state about 60 minutes ago. He had been previously healthy. On physical examination he appeared ill, lethargic, poor-feeding and palling. Breathing rate was mildly elevated, 50 breaths in minutes. Heart rate was significantly elevated, peripheral pulses were week and skin with poor perfusion. Electrocardiographic examination revealed tachycardia with a frequency of 278 heart beats/minute, QRS complexes were narrow with very short PR interval and P waves at the end of QRS complexes. Radiologic examination of the thorax and ultrasound of the heart and abdomen resulted normal. Diagnosis of Supraventricular tachycardia was performed. Tachycardia was ceased soon after amiodarone administration.

Conclusions Paroxysmal Supraventricular tachycardia is the most common dysrhythmia in children. In infants it presents with nonspecific symptoms including poor feeding, irritability, vomiting, cyanosis or pallor which characterize other serious childhood conditions. If the symptoms go unrecognized for hours to days, the infant can present with significant hemodynamic compromise or heart failure symptoms.