Theorists have staked out two ostensibly opposing views of human crying as either an arousing behavior that signals distress or a soothing behavior that reduces arousal after distress. The present study examined whether these views of crying might be reconciled by attending to physiological changes that unfold over crying episodes. Sixty female students watched neutral and cry-eliciting films w...

Two spectral components of heart rate variability, respiratory sinus arrhythmia (RSA) and Mayer wave-related sinus arrhythmia (MWSA), respectively provide noninvasive indices of cardiac vagal activity and systemic sympathetic activity with vagal modification. Their amplitudes are usually obtained from spectral analysis of R-R intervals measured on an electrocardiogram (ECG). In the present stud...

The effect of respiration on heart rate has been described as sinus arrhythmia in anaesthetized animals by Heymans (6). Each inspiration is accompanied by an acceleration and slowing accompanies every expiration. A sustained inflation of the lungs in dog has been shown to cause bradycardia (l ) i. e. the opposite of the classical sinus arrhythmia. The above results have been obtained on animals...

INTRODUCTION Atrial premature contractions (APCs) are commonly encountered in clinical practice. The APCs may influence heart conduction system and induce other arrhythmia. The disorder of atrioventricular conduction is related to electrophysiological phenomena, difficult to understand and diagnose. CASE REPORT We presented a 15-year-old male patient whose baseline electrocardiogram (ECG) was...

We aimed to test whether the evaluation of the cardio-respiratory interaction using the analysis of heart rate and blood pressure variabilities and respiratory maneuvers can reveal cardiovagal dysfunction in obese adolescents 12-18 years old. The spectral power in high frequency band of the heart rate variability (HRV) reflecting respiratory sinus arrhythmia was used as an index of the cardiac ...

Blood pressure and heart periods fluctuate at respiratory frequencies in healthy humans. Some researchers (8, 23) explain this as a cause-and-effect relation: blood pressure changes trigger baroreflex-mediated R-R interval changes. Here I make the case that respiratory sinus arrhythmia is a central phenomenon that is independent of blood pressure changes. I base this argument on several well-do...

Anomalous origin of coronary arteries is generally asymptomatic and a rare disease. However, some cases can cause severe life-threatening events such as myocardial ischemia, arrhythmia, and acute myocardial infarction. We describe a case of a single coronary artery arising from the right sinus of Valsalva in a 48-year-old female patient with a complaint of stable angina pectoris and palpitation...

The author examined whether respiratory sinus arrhythmia (RSA) responses to stress predicted resting RSA approximately 3 years later in children and adolescents. A total of 149 children and adolescents (49% girls and women, 44% African Americans) participated in 2 laboratory protocols approximately 3 years apart. RSA reactivity during tasks was consistent within participants across tasks during...

Background Atrial fibrillation (AF) is the most frequent arrhythmia, and its prevalence increases with age. The management of AF in elderly challenging, as it normally associated comorbidities frailty. catheter ablation (CA) a safe superior alternative to antiarrhythmic drugs (AADs) for maintenance sinus rhythm. Objectives To evaluate rate complications CA across different age groups. Methods A...

The coronary sinus (CS) is the cardiac venous system that begins at its ostium in the right atrium and ends at the origin of the great cardiac vein.1,2,3 The major tributaries of the CS include the great cardiac vein (anterior cardiac vein), the left obtuse marginal vein, the posterior (or inferior) left ventricular vein, the middle cardiac vein, and the right coronary vein. In addition, atrial...