Justin Tan - Academia.edu (original) (raw)
Related Authors
Sackler School of Medicine/American Program of Tel Aviv University School of Medicine
Sackler School of Medicine/American Program of Tel Aviv University School of Medicine
Uploads
Papers by Justin Tan
The American Journal of Cardiology, 2008
Patients with catecholaminergic polymorphic ventricular tachycardia present at a young age with e... more Patients with catecholaminergic polymorphic ventricular tachycardia present at a young age with exercise-induced ventricular arrhythmias (VAs) and may have a positive family history. We describe 8 patients who presented with exercise-induced symptoms as adults, have a negative family history, and responded to -blocker therapy. The study evaluated exercise treadmill electrocardiographic data from patients referred for exercise-induced VA. Inclusion criteria consisted of development of bidirectional, pleomorphic, or polymorphic ventricular tachycardia with exercise, adult age at first onset, negative family history, and no evidence of structural heart disease. We correlated VA configurations with respect to heart rate before and after -blocker therapy. Patients displayed a pattern of increasing ventricular complexity with increasing heart rate. The appropriate  blocker (n ؍ 7) or calcium channel blocker (n ؍ 1) was defined as the dose that resulted in control of symptoms. Three patients showed suppression of VA with sinus tachycardia at peak heart rate. Six patients had decreased VA defined as absence of higher complexity arrhythmias. With drug therapy, average heart rate associated with premature ventricular complex couplets/triplets increased, whereas duration and complexity of premature ventricular complexes decreased. One patient had an automatic implantable cardiac defibrillator placed but has had no discharges from the device since starting the appropriate  blocker. In conclusion, these patients appear to respond well to -blocker or calcium channel blocker therapy with decreased ectopic complexity and an increased heart rate threshold for inducing VA.
PURPOSE/AIM The esophagram remains a useful imaging tool despite the increased use of cross-secti... more PURPOSE/AIM The esophagram remains a useful imaging tool despite the increased use of cross-sectional imaging and endoscopy. It is inexpensive, fast, non-invasive and allows dynamic imaging and mucosal evaluation. This exhibit will review the anatomy of the esophagus, followed by cases of important pathology well demonstrated by esophagram. CONTENT ORGANIZATION 1. Normal anatomy as seen on esophagram 2. Normal impressions on the esophagus from adjacent structures including normal variants 3. Case review in quiz format including: esophageal cancers, achalasia, infectious esophagitis (HIV, candida, HSV), inflammatory esophagitis (reflux, ingestion, eosinophilic), esophageal perforation, strictures and diverticula. SUMMARY Anatomy will be presented in a didactic format. Cases will follow showing images accompanied by questions about diagnosis and management, whether it be clinical or further imaging. Upon completing the exhibit, the reader should have a solid understanding of the norma...
The American Journal of Cardiology, 2008
Patients with catecholaminergic polymorphic ventricular tachycardia present at a young age with e... more Patients with catecholaminergic polymorphic ventricular tachycardia present at a young age with exercise-induced ventricular arrhythmias (VAs) and may have a positive family history. We describe 8 patients who presented with exercise-induced symptoms as adults, have a negative family history, and responded to -blocker therapy. The study evaluated exercise treadmill electrocardiographic data from patients referred for exercise-induced VA. Inclusion criteria consisted of development of bidirectional, pleomorphic, or polymorphic ventricular tachycardia with exercise, adult age at first onset, negative family history, and no evidence of structural heart disease. We correlated VA configurations with respect to heart rate before and after -blocker therapy. Patients displayed a pattern of increasing ventricular complexity with increasing heart rate. The appropriate  blocker (n ؍ 7) or calcium channel blocker (n ؍ 1) was defined as the dose that resulted in control of symptoms. Three patients showed suppression of VA with sinus tachycardia at peak heart rate. Six patients had decreased VA defined as absence of higher complexity arrhythmias. With drug therapy, average heart rate associated with premature ventricular complex couplets/triplets increased, whereas duration and complexity of premature ventricular complexes decreased. One patient had an automatic implantable cardiac defibrillator placed but has had no discharges from the device since starting the appropriate  blocker. In conclusion, these patients appear to respond well to -blocker or calcium channel blocker therapy with decreased ectopic complexity and an increased heart rate threshold for inducing VA.
PURPOSE/AIM The esophagram remains a useful imaging tool despite the increased use of cross-secti... more PURPOSE/AIM The esophagram remains a useful imaging tool despite the increased use of cross-sectional imaging and endoscopy. It is inexpensive, fast, non-invasive and allows dynamic imaging and mucosal evaluation. This exhibit will review the anatomy of the esophagus, followed by cases of important pathology well demonstrated by esophagram. CONTENT ORGANIZATION 1. Normal anatomy as seen on esophagram 2. Normal impressions on the esophagus from adjacent structures including normal variants 3. Case review in quiz format including: esophageal cancers, achalasia, infectious esophagitis (HIV, candida, HSV), inflammatory esophagitis (reflux, ingestion, eosinophilic), esophageal perforation, strictures and diverticula. SUMMARY Anatomy will be presented in a didactic format. Cases will follow showing images accompanied by questions about diagnosis and management, whether it be clinical or further imaging. Upon completing the exhibit, the reader should have a solid understanding of the norma...