An arrhythmia is a problem with the speed or rhythm of the heartbeat. During an arrhythmia, the heart can beat too fast, too slow, or with an irregular rhythm. A heartbeat that is too fast is called tachycardia. A heartbeat that is too slow is called bradycardia. Most arrhythmias are harmless, but some can be serious or even life threatening. When the heart rate is too slow, too fast, or irregular, the heart may not be able to pump enough blood to the body. Lack of blood flow can damage the brain, heart, and other organs.
Calling an ambulance during an emergency, emailing a breaking news or journal article before a 5 p.m. deadline and maintaining conditions during the fifth week of a 6-week lab study, without altering the light or temperature, requires electricity and translates into time, money and lives
Australian researchers have unlocked the mystery as to why the chemotherapy drug 5-Fluorouracil is not effective at treating certain cancers.
Researchers at Boston Children's Hospital report creating the first human tissue model of an inherited heart arrhythmia, replicating two patients' abnormal heart rhythms in a dish, and then suppressing the arrhythmia with gene therapy in a mouse model.
Hesperos Inc., pioneers of the "human-on-a-chip" in vitro system has announced the use of its innovative multi-organ model to successfully measure the concentration and metabolism of two known cardiotoxic small molecules over time, to accurately describe the drug behavior and toxic effects in vivo.
Atrial fibrillation is a condition that produces an irregular heartbeat that affects about two percent of the general population and six percent of people over 65 years of age.
More than half of patients with relapsed multiple myeloma treated with carfilzomib experienced cardiac issues during treatment, according to a multi-institutional study published June 12 in Journal of Clinical Oncology.
Canadian researchers followed their intuition that a drug initially intended for heart failure could be effective in treating cancer. Those efforts have borne fruit, as demonstrated by their work published in the Journal of Experimental and Clinical Cancer Research.
Obstructive sleep apnea is a common condition that has been associated with increased mortality, especially in individuals who have cardiac arrhythmia. A University of Arizona physician-scientist has received a grant to try to find out why.
Women have long been told fainting is a common but harmless symptom of pregnancy, but new research shows it may indicate issues for both the baby and mother's health, especially when it occurs during the first trimester.
Drinking 32 ounces of an energy drink in a short timespan may increase blood pressure and the risk of electrical disturbances in the heart, which affect heart rhythm, according to a small study published in Journal of the American Heart Association, the Open Access Journal of the American Heart Association/American Stroke Association.
Fainting spells especially early in the pregnancy could indicate health problems for the mother and baby later says a new study. Earlier short spells of black outs or syncope were considered to be normal during early pregnancy.
Patients with atrial fibrillation or AFib experience chaotic electrical signals in the upper chamber of their heart (atria), which cause an irregular or quivering heartbeat (arrhythmia) that can lead to blood clots and heart failure. AFib also is a major cause of stroke and affects 33 million people worldwide.
According to clinical studies, about a third of patients with atrial fibrillation will suffer a stroke during their lifetime. Between 70 and 90% of these strokes are caused by a thrombus formed in the left atrial appendage.
A new study shows that overweight patients who have bariatric surgery before undergoing ablation reduce their risk of the arrhythmia returning.
Many patients with an implantable cardioverter defibrillator(ICD) are anxious of the shock delivered by the device to stop life-threatening ventricular arrhythmia or fibrillation.
A new study has found that stress-related disorders are associated with an increased risk for multiple types of cardiovascular disease, including atherosclerosis (narrowing of the arteries).
A group of researchers followed up a population of siblings and tried to estimate the connection between stress-related conditions and heart disease. Their study titled “Stress related disorders and risk of cardiovascular disease: population based, sibling controlled cohort study,” was published in the latest issue of the journal BMJ.
Scientists at the University of Navarra (Spain), in collaboration with clinicians from the University Hospital of Donostia, have identified two biomarkers associated with the risk of suffering atrial fibrillation, a cardiac ailment that affects more than 33.5 million people in the world.
Combining a wealth of information derived from previous studies with data from more than 500 patients, an international team led by researchers from Johns Hopkins has developed a computer-based set of rules that more accurately predicts when patients with a rare heart condition might benefit--or not--from lifesaving implanted defibrillators.
Although smart wristbands are popular fashion gadgets for monitoring heart rate and physical activity, they are usually not sophisticated enough to provide specific and accurate information about potential health problems of the wearer.