Search results
Results from the WOW.Com Content Network
A characteristic delta wave (above the blue bar), a short PR interval (red bar) of 80 ms, and a long QRS complex (blue bar plus green bar) at 120 ms are visible. WPW is commonly diagnosed on the basis of the electrocardiogram in an asymptomatic individual.
Intermittent rhythmic delta activity (IRDA) is a type of brain wave abnormality found in electroencephalograms (EEG). [1] Types.
Video explanation. Author: Tanner Marshall, MS Editor: Rishi Desai, MD, MPH, Tanner Marshall, MS Wolff-parkinson-white pattern, or WPW, is a type of heart arrhythmia caused by an accessory pathway, or an “extra” electrical conduction pathway connecting the atria and ventricles, or upper and lower chambers of the heart.
Lown–Ganong–Levine syndrome (LGL) is a pre-excitation syndrome of the heart. Those with LGL syndrome have episodes of abnormal heart racing with a short PR interval and normal QRS complexes seen on their electrocardiogram when in a normal sinus rhythm.
A delta wave is an initial slurred deflection seen in the initial part of an otherwise narrow QRS of a patient at risk for WPW and is an indicator of the presence of an accessory pathway. These beats are a fusion between the conduction down the accessory pathway and the slightly delayed but then-dominant conduction via the AV node.
Pre-excitation is caused by an abnormal electrical connection or accessory pathway between or within the cardiac chambers. Pre-excitation may not cause any symptoms but may lead to palpitations caused by abnormal heart rhythms. It is usually diagnosed using an electrocardiogram, but may only be found during an electrophysiological study. [2]
The presence of a short PR interval and a delta wave (Wolff-Parkinson-White syndrome) is an indication of the existence of ventricular pre-excitation. [1] Significant left ventricular hypertrophy with deep septal Q waves in I, L, and V4 through V6 may indicate hypertrophic obstructive cardiomyopathy. [1]
Syndrome Cause cardiac signs and symptoms Other symptoms or organs affected Notes 1q21.1 deletion syndrome: genetic (Chromosome 1)Cardiovascular anomalies are present in 30% of the cases (for example anomalous origin of the coronary artery in "Class II-deletion")