Introduction: Paraquat (1,1’-dimethyl-4, 4’-dipyridylium) intoxication is a major medical problem in developing countries. The ingestion of paraquat is fatal in humans and its mortality rate is as high as 50%. Paraquat intoxication has a systemic effect on the lung, kidney, gastrointestinal tract, central nervous system, and even on the heart. Case report: A female patient visited our emergency...

BACKGROUND It has been claimed that patients with sick sinus syndrome have an increased risk of developing AV block, but this has never been assessed prospectively. The aim of the present study was to evaluate in a prospective trial AV conduction during the long-term follow-up of patients with sick sinus syndrome. METHODS Two hundred twenty-five consecutive patients with sick sinus syndrome a...

A 58-year-old man without comorbidity presented with high fever, chills, and myalgia. Examination showed right inguinal lymphadenopathy; an eschar was present in the ankle region (Figure 1). His blood pressure was 100/60 mmHg, heart rate was 70 beats/minute, and the electrocardiogram (ECG) showed normal sinus rhythm (Figure 2A). The platelet count was 74,000/μL, total bilirubin was 1.3 mg/dL, a...

Introduction Myocardial involvement in polymyositis has been increasingly recognized since it was first reported by Oppenheim (1899). Cardiac manifestations include congestive cardiac failure (Lynch, 1971; Bohan et al., 1977; Denbow et al., 1979), pericarditis (Lynch, 1971), atrioventricular and bundle branch block (Lynch, 1971, Schaumburg, Nielsen and Yurchak, 1971; Henderson et al., 1980) and...

A case of sick sinus syndrome, which was originally diagnosed during 1958, had an extensive followup for over 20 years by several clinicians. He showed a wide spectrum of associated rhythm disorders includ-tng sinus irregularity, extrasystoles, paroxysmal supraventricular tachycardia and Wenkebach's phenomenon. He remained physically fit and active, and did not require active medications, and d...

To the Editor: I read with interest the article on the treatment of patients who have sick sinus syndrome (SSS) with single-chamber atrial pacing by Anderson et al.1 However, their finding of the annual risk of secondor third-degree atrioventricular (AV) block of only 0.6% per year contrasts somewhat with the reported findings that abnormal AV conduction was demonstrated in 57% to 67% of patien...

The clinical spectrum of the sick sinus syndrome (SSS) is described in a series of 56 patients who demonstrated either persistent unexplained sinus bradyeardia (group I: eight patients); sinus arrest (group II: 15 patients); or bradyeardia with episodic supraventricular tachyarrhythmias (group III: 33 patients). Coronary disease was the most common form of heart disease where etiology could be ...