. "Arrhythmia"^^ . "Arrhythmia"^^ . "ARRHYTHMIAPTFDA1721" . "NICHD"^^ . "FDA"^^ . . "Patient Code (Appendix B)"^^ . "Arrhythmia"^^ . "Finding"^^ . "An electrocardiographic finding of any variation from the normal rate or rhythm (which may include the origin of the impulse and/or its subsequent propagation) in the heart.NCI" . "Cardiac ArrhythmiaSYNCI" . "C0003811"^^ . "Cardiac ArrhythmiaPTNICHD" . . "C2881"^^ . . "Cardiac Arrhythmias are heart-rhythm problems - they occur when the electrical impulses to the heart that coordinate heartbeats are not working properly, making the heart beat too fast/slow or inconsistently. NICHD" . . . . "ArrhythmiaPTNCI" . .