atrial dissociation is characterized by different types of p waves captured in an electrocardiogram, usually seen in critically ill or post-cardiac transplantation patients. our case demonstrates a 55-year-old man, presenting with chest pain (unstable angina) in the emergency department with transient double-p waves; representing the phenomenon. our case did not have any of the suggested causes...

background and objectives: multiple sclerosis (ms) is the most prevalent autoimmune disease of the central nervous system, and it has been suggested that nutrition might play a role in the etiology of ms. this study was aimed to evaluate the relationship between ms risk and intake of some macro- and micro-nutrients in tehran (iran). materials and methods: in this hospital based, case-control st...

background: lung cancer is considered as one of the most frequent cancers worldwide, and has been the cause of more than onemillion mortalities each year. exposure to tobacco smoke is the primary cause of most lung cancers, since it contains several thousandcompounds, including more than 50 known carcinogens. however, a small fraction of individuals who are exposed to tobacco smokedevelop lung ...

introduction: job stress is one of the main characteristics of modern life which is increasing and has been recognized as an important risk factor of cardiovascular diseases. the present study was conducted to determine the association between job stress at work environment and cardiovascular diseases. materials and methods: a number of 300 persons including 150 cases and 150 controls were cons...

ihd as a modern epidemic of our age is one of the main causes of mortality in iran. this research was done in order to determine the relationship between place of residence and place of occupation (as indicator of air pollution exposures) and other risk factors with ihd. this is a case- control study of ihd involving 191 men aged 45 -70 years. the cases were 91 male patients with myocardial inf...

objective: calpains are a family of ca 2+ dependent proteases. there is some evidence that calpains involved in fusion process that occurs between spermatozoa and the oocyte. the current study aimed to investigate the association of smoking with semen quality and µ-calpain level. materials and methods: this case-control study was conducted on 117 normospermia males  between june 2013 and march ...