A case presenting with AV nodal escape rhythms after obvious sinus depression is described. The escape rhythms arise from two dissociated AV nodal pacemakers with differential physiological properties. Variation in the rate of the upper AV nodal pacemaker results in a form of escape-capture bigeminy. Temporary acceleration of the sinus rhythm results in dissociation between sinus and lower AV n...

This study aimed to examine (a) whether findings of increased cardiovascular reactivity in relation to cognitive ability seen in infants, young adults and the elderly can be extended to middle childhood and (b) which specific aspect(s) of intelligence is related to cardiovascular reactivity. We examined cardiovascular activity in 340 8- and 9-year-old children during a number judgment task and ...

background: alcohol consumption has multiple side effects on heart which can be divided to six subgroups: heavy alcohol drinkers (80 g/day alcohol consumption) are most susceptible to cardiac complications. the aim of this study was to review alcohol side effects on heart and two present two alcoholic patients with alcoholic cardiomyopathy. case report: case a: a 52 year-old man presented with ...

Trajectories of emotion regulation processes were examined in a community sample of 269 children across the ages of 4 to 7 using hierarchical linear modeling. Maternal depressive symptomatology (Symptom Checklist-90) and children's physiological reactivity (respiratory sinus arrhythmia [RSA]) and vagal regulation (Delta RSA) were explored as predictors of individual differences in trajectories ...

This study examined the direct and interactive effects of stress reactivity and family adversity on socioemotional and cognitive development in three hundred and thirty-eight 5- to 6-year-old children. Neurobiological stress reactivity was measured as respiratory sinus arrhythmia and salivary cortisol responses to social, cognitive, sensory, and emotional challenges. Adaptation was assessed usi...

BACKGROUND Psychopathology in youth appears to be linked to deficits in regulating affective responses to stressful situations. In children, high-quality parental support facilitates affect regulation. However, in adolescence, the role of parent-child interaction in the regulation of affect is unclear. This study examined physiological reactivity to and recovery from stress in adolescents at ri...

OBJECTIVES This study sought to characterize direction-dependent and coupling interval-dependent changes in left atrial conduction and electrogram morphology in uniformly classified patients with paroxysmal atrial fibrillation (AF) and normal bipolar voltage mapping. BACKGROUND Although AF classifications are based on arrhythmia duration, the clinical course, and treatment response vary betwe...

OBJECTIVE To determine association between patient's symptoms and incidence of arrhythmia on 24-hour electrocardiographic Holter monitoring. STUDY DESIGN A cross-sectional descriptive study. PLACE AND DURATION OF STUDY The Cardiology Department, Liaquat National Hospital, Karachi, from January to June 2007. METHODOLOGY Patients above 15 years of age, of either gender, referred for Holter ...

Objective of this paper is to analyze noise free ECG signal and to discriminate the arrhythmia data from normal sinus rhythm data. ECG data is characterized by its nonlinear dynamic behavior, which shows significant changes between normal and arrhythmia data. Presence of artifacts like 60Hz power line interference (PLI), low frequency base line wander noise (2Hz) and muscle artifacts will not a...

BACKGROUND Accelerated idioventricular rhythm (AIVR) or ventricular tachycardia (VT) originating from the right bundle branch (RBB) is rare and published clinical data on such arrhythmia are scarce. In this study, we will describe the clinical manifestations, diagnosis, and management of a cohort of patients with this novel arrhythmia. METHODS AND RESULTS Eight patients (5 men; median age, 25...