Heart Rhythms (EKG) with Complete Solutions

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Heart Rhythms (EKG) with Complete Solutions normal sinus rhythm (NSR) regular rhythm of the heart cycle stimulated by the SA node (average rate of 60-100 beats/minute) Sinus Bradycardia <60 bpm Sinus Tachycardia >100 bpm Premature Atrial Contraction (PAC) irregular heart rhythm characterized by atrial contractions occurring before the expected time Supraventricular Tachycardia (SVT) an abnormal heart rhythm arising from abnormal electrical activity in the heart; originates at or above the AV node Sinus Arrest - SA node doesn't fire - notice absence of P-wave for a complete cycle (a missed cycle) Sinus Arrhythmia A sinus rhythm in which the rate varies with respiration, causing an irregular rhythm. atrial fibrillation occurs when the normal rhythmic contractions of the atria are replaced by rapid irregular twitching of the muscular heart wall Preventricular Contraction (PVC) Abnormal beat generated from the ventricles. Characterized by a wide and bizarrely shaped QRS. ventricular tachycardia A rapid heart rhythm in which the electrical impulse begins in the ventricle (instead of the atrium), which may result in inadequate blood flow and will eventually deteriorate into cardiac arrest. Characterized by a "saw tooth" or "shark tooth" rhythm strip. Torsades de pointes It is a polymorphic ventricular tachycardia that is charazterized by "twisting peaks" on the QRS. (Resembles a sound wave). It is a specific type of abnormal heart rhythm that can lead to sudden cardiac arrest. Ventricular fibrillation (V-fib) abnormal heart rhythm which results in quivering of ventricles. Not compatible with life. Atrial Flutter your heart's upper chambers (atria) beat too quickly causing a fast but regular rhythm. First degree heart block The atrial electrical impulses are delayed before being conducted to the ventricles Second degree heart block type I - aka Wenckebach - progressiveley prolonged PR interval WITH QRS DROP - unique feature is presence of a prolonging PR interval from one cardiac complex to the next until it reaches a point where the QRS complex is blocked or missing Second Degree Heart Block Type II More P waves than QRS complexes

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