EKG 5-2013: Hemibloqueo fascicular izquierdo anterosuperior

Bi-fascicular block on EKG as the initial presenting sign of cardiac sarcoidosis.

A 41-year-old commercial painter with a history of tobacco use presented to the emergency department with complaints of cough, pleuritic chest pain and worsening dyspnea with exertion beginning 3 days prior to arrival. He had not responded to an outpatient regimen of bronchodilators and antibiotics. The patient denied any constitutional symptoms. On initial examination, the patient was afebrile...

Anterosuperior Glenoid Impingement Syndrome

Anterosuperior glenoid impingement is a well documented cause of shoulder pain. It occurs when there is deep tearing of the subscapularis, with fibers becoming embedded between the anterosuperior glenoid and humeral head. To our knowledge, this has not been described in radiologic literature and we present MRI findings depicting this entity.

Non-Reentrant Fascicular Tachycardia

Reentry is a common mechanism of ventricular tachycardia (VT) that originates from the Purkinje system, and verapamil-sensitive idiopathic left ventricular tachycardia (ILVT) is considered the most common form of Purkinjerelated idiopathic VT. Although focal non-reentrant fascicular tachycardia (NRFT) was reported in patients with structural heart diseases involving the Purkinje system, such as...

The EKG Sequence

The EKG or electrocardiogram sequence is defined by a(1) = 1, a(2) = 2 and, for n ≥ 3, a(n) is the smallest natural number not already in the sequence with the property that gcd{a(n − 1), a(n)} > 1. In spite of its erratic local behavior, which when plotted resembles an electrocardiogram, its global behavior appears quite regular. We conjecture that almost all a(n) satisfy the asymptotic formul...

Cover vol. 10, no. 5, October 2013