Functional characteristics of left ventricular synchronization via right ventricular outflow-tract pacing detected by two-dimensional strain echocardiography.

Background: Recently, due to the detrimental effects on the ventricular function associated with right ventricular apical (RVA) pacing, right ventricular septal (RVS) pacing has become the preferred pacing method. However, the term RVS pacing refers to both right ventricular outflow-tract (RVOT) and mid-septal (RVMS) pacing, leading to a misinterpretation of the results of clinical studies. The purpose of this study, therefore, was to elucidate the functional differences of RVA, RVOT, and RVMS pacing in patients with atrioventricular block.

Stent thrombosis caused by metal allergy complicated by protein S deficiency and heparin-induced thrombocytopenia: a case report and review of the literature.

A 43-year-old woman recipient of a bare metal coronary stent during an acute anterior myocardial infarction was repeatedly hospitalized with recurrent stent thrombosis (ST) over the following 3 years. Emergent coronary angiography showed a thrombus in the in-stent segment of the proximal left anterior descending artery. We repeatedly aspirated the thrombus, which immediately reformed multiple times.

[Abnormalities of magnesium (Mg) metabolism and therapeutic significance of Mg administration in patients with metabolic syndrome, type 2 diabetes, heart failure and chronic hemodialysis].

Magnesium (Mg) , one of the fundamental minerals acting the co-factor of about 300 kinds of enzymes and natural Ca channel blocker, plays an important role of cardiovascular, neurological, and metabolic functions in physiological, and pathophysiological conditions. Common abnormal Mg metabolism is an absolute or relative deficiency of Mg due to an attenuated Mg intake and an enhanced urinary Mg excretion, particularly in the metabolic syndrome (MetS) , type 2 diabetes (DM) , chronic heart failure (CHF) and hemodialysis (HD) patients with diabetes. It has been reported the Mg deficiency relating to enhanced risk of MetS and type 2 DM, and to fatal cardiac events in CHF and an atherosclerotic, vascular calcification in HD patients.

[Acute coronary syndrome due to coronary thrombus formed by severe coronary spasm: a case report].

A 47-year-old man was admitted to our hospital complaining of chest pain at rest in the early morning. Electrocardiography showed ST segment elevation in leads II, III and aVF. Emergency coronary angiography revealed total occlusion of the right coronary artery at the proximal portion.

[Influence of number of citizens greater than 50 years of age on prevalence of acute myocardial infarction: epidemiological study of Sapporo residents].

Background: Epidemiological studies have investigated the prevalence of acute myocardial infarction (AMI) in towns, medium cities and counties in Japan. The prevalence of AMI in a large city such as Sapporo has never been reported because of the difficulty of monitoring all patients with AMI. The population of middle-aged and senior residents has increased dramatically in Japan, and the impact of aging population on the prevalence of AMI is unknown.