What Is Sinus Bradycardia?

What is sinus bradycardia and where does it start from. Sinus bradycardia starts from the sinus node; it is a heart rhythm and has a rate of fewer than 60 beats per minute (bps). Simple words on what is sinus bradycardia they are the sinus beat when a resting heart strikes 60 bps or even less. The sinus rhythms cause a P-wave on the ECG which means it is normal in terms of both amplitude and vector. They are tagged on with QRS complex and T waves.

A normal baby should have a heart beat of 150 bps; Bradycardia decelerates the premature baby's heart to less than 100 beats per minute. Infection, anemia, change in body temperature, hypoglycemia, airway problems, neurological difficulties are caused due to Bradycardia.

What are sinus bradycardia symptoms?

Sinus bradycardia does not normally have any symptoms. But at times there are indications like dizziness, lightheadedness; exercise intolerance, chest pain and succinctness of breath are seen.

The problems that result due to bradycardia are of two types: they are sinatorial node (SA node) disorder and atrioventricular node (AV node) disorder. The former is called sick sinus syndrome and is due to the weakened conduction of the impulse from the sinus node. The later may result due to weakened conduction in the AV node or even underneath in the bundle of HIS. This may be acquired congenitally (disorder by birth). It is found most commonly in elderly patients.

What is sinus bradycardia cure?

Treatment for asymptomatic patients is not signified, but symptomatic patients should be corrected of underlying electrolyte and acid base disorder. Intravenous atropine gives relief temporarily. Previously isoproterenol was used in patients with bradycardia, but due to the increase in risk its usage has been lessened. Temporary pacing also is recommended for patients who are not responsive to atropine although transcutaneous pacing is the primary choice for physicians.

The medication techniques include therapy and supratherapeutic doses of digitalis glycosides, beta-blockers and calcium channel blocking agents. Cardiac drugs are also used.

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TV And Computer Screen Time May Be Associated With High Blood Pressure In Young Children

Sedentary behaviors such as TV viewing and "screen time" involving computer use, videos and video games appear to be associated with elevated blood pressure in children, independent of body composition, according to a report in the August issue of Archives of Pediatrics & Adolescent Medicine, one of the JAMA/Archives journals. The recent trend in obesity is a major public health concern and its effect on blood pressure is of particular concern, according to background information in the article.

"The clustering of cardiovascular disease risk factors in overweight youth suggests that risks may be immediate and not just indicative of potential future problems," the authors write. Although elevated blood pressure is associated with genetic factors, healthy physical, dietary and sleep habits seem to be relevant contributors to blood pressure levels in children. However, there have not been any clear links between sedentary behavior and elevated blood pressure in children younger than age 9. David Martinez-Gomez, B.Sc., of Iowa State University, Ames, and the Spanish National Research Council, Madrid, Spain, and colleagues examined associations between sedentary behavior and elevated blood pressure in 111 young children (57 boys and 54 girls ages 3 to 8).

Sedentary behavior was determined by an accelerometer generally worn over the right hip and by parental reports stating the average time the children spent watching TV, playing video games, painting, sitting or taking part in other activities with low levels of physical activity each day for seven days. Time watching TV was defined as time spent watching TV, videotapes or DVDs. Computer use was defined as the time spent using a home computer or video game. Researchers defined screen time as the total amount of time each child spent using a TV, video, computer or video game. The children's height, weight, fat mass and systolic (top number) and diastolic (bottom number) blood pressure were also measured. The children's average sedentary time and screen time per day were five hours and 1.5 hours, respectively. Boys spent more time using computers than girls, but there were no significant differences in time spent on other sedentary behaviors. "Sedentary activity was not significantly related to systolic blood pressure or diastolic blood pressure after controlling for age, sex, height and percentage of body fat. However, TV viewing and screen time, but not computer use, were positively associated with both systolic blood pressure and diastolic blood pressure after adjusting for potential confounders," the authors write. "Participants in the lowest tertile [one-third] of TV and screen time had significantly lower levels of systolic and diastolic blood pressure than participants in the upper tertile."

"In conclusion, the results of this study showed that TV viewing and screen time were associated with elevated blood pressure independent of body composition in children," the authors write. "Given that total objective sedentary time was not associated with elevated blood pressure, it appears that other factors, which occur during excessive screen time, should also be considered in the context of sedentary behavior and elevated blood pressure development in children."

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