Which condition is characterized by a heart rate greater than 220 bpm in infants and greater than 180 bpm in children?

The condition characterized by a heart rate greater than 220 beats per minute in infants and greater than 180 beats per minute in children is known as Supraventricular Tachycardia (SVT). SVT is a type of fast heart rhythm that originates above the ventricles, often in the atria or the atrioventricular (AV) node. In pediatric patients, this condition can present acutely and may lead to symptoms such as palpitations, fatigue, dizziness, or difficulty breathing.

The diagnosis of SVT in children, especially if they present with such elevated heart rates, is crucial as it requires prompt assessment and management to prevent potential hemodynamic instability. Effective treatment for SVT can include vagal maneuvers, medications, or in some cases, electrical cardioversion, depending on the severity of the symptoms and the clinical context.

Understanding the specific heart rate parameters for infants and children is vital for accurate diagnosis and timely intervention in emergency settings.