User:Mr. Ibrahem/Tachycardia

Tachycardia is a heart rate that exceeds 100 beats per minute in an adult, though is of greater concern when it exceeds 150. Symptoms may vary from none to severe. These may include palpitations, light headedness, shortness of breath, chest pain, or syncope.

Types include sinus tachycardia, paroxysmal supraventricular tachycardia, atrial fibrillation, atrial flutter, extra beats such as atrial premature beats and ventricular premature beats, ventricular tachycardia, and ventricular fibrillation. Underlying risk factors include low oxygen, fever, heart disease, stimulants, and electrolyte abnormalities. Diagnosis is by electrocardiogram (ECG). They can be divided into narrow complex and wide complex and than further divided into regular and irregular.

Treatment depends on the type of tachycardia. An underlying cause may need to be addressed, if present. If a person is unstable due to the tachycardia, synchronized cardioversion is generally recommended, though in certain cases adenosine may be used. If the QRS complex is narrow and the person is stable vagal maneuvers, adenosine, beta blockers, or calcium channel blockers may be used. Tachycardia is common.