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.
The first double-blind, placebo-controlled randomized trial of VEGF gene injections into the heart muscle of patients with coronary artery disease with the intention of spurring growth of new blood vessels showed significant effects on heart wall motion, although blood flow was not significantly better in treated patients, according to a new study in the April 5, 2005, issue of the Journal of the American College of Cardiology.
Asthma is the most common cause of exercise-induced shortness of breath in children and adolescents. While a diagnosis of asthma is often correct, University of Iowa pediatric pulmonary physicians caution that other unrelated conditions also can cause shortness of breath during exercise.
Mice with glowing green hearts have yielded the latest clue in the search for molecules involved in structural heart disease. Vanderbilt University Medical Center investigators found that blocking the activity of a single protein, called CaM kinase, in the mouse heart protects against the damaging effects of a heart attack.
Virginia Commonwealth University Medical Center physicians are among the first in the country to use a new form of technology to treat distant, malfunctioning areas inside the heart that cause irregular heartbeats, or cardiac arrhythmias.
A Johns Hopkins undergraduate student has contributed to new research showing that electrical changes in the heart leading to heart failure can occur long before a patient exhibits any clinical symptoms.
Implanted devices intended to optimize the cardiac function of patients with heart failure have provided new insights into which patients might be at higher risk of dying suddenly from their disease, according to researchers at Duke University Medical Center.
In new medical guidance for England and Wales published today, the National Institute for Clinical Excellence (NICE) promotes the expanded use of dual-chamber pacemakers for treating slow heart rhythms, called bradycardia, which affect an estimated 100,000 people in the UK.
This data refutes previous evidence which suggested a high incidence of injury to a patient's cardiac nerves, possibly resulting in accelerated heart rates following the procedure.
A recent study published in Pacing and Clinical Electrophysiology (PACE) determined that the use of catheter ablation to treat supraventricular tachycardia (SVT) is not detrimental to patients.
Scientists at the University of North Carolina at Chapel Hill School of Medicine have shown that a protein in cardiac muscle cells may play a crucial role in heart failure prevention.
Racial disparities in the use of implantable cardioverter-defibrillators (ICDs) declined during the 1990s as use of the devices spread into communities with larger African-American populations, according to a new study in the Jan. 4, 2005 issue of the Journal of the American College of Cardiology.
Sudden cardiac death from emotional stress may be triggered by uneven signals from the brain to the heart, according to a study by University College London (UCL) scientists published in the January issue of Brain.
In a newly reported, first-ever finding, physicists from Boston University and physiologists from Boston’s Brigham and Women’s Hospital (BWH) have found that the body’s biological clock affects the patterns of heart-rate control in healthy individuals independent of sleep/wake cycle or other behavior influences.
The People's Hospital of Beijing University performed a combined revascularization procedure utilizing beating heart bypass surgery, along with transmyocardial revascularization and stem cell implantation.
Celgene Corporation announced today that data evaluating clinical results on Revlimid (lenalidomide) as a new therapeutic approach for patients with newly diagnosed multiple myeloma (MM) was presented at the American Society of Hematology 46th Annual Meeting in San Diego.
Long an under-studied yet widely-used over-the-counter medication, acetaminophen over the last few years is becoming recognized for a range of potential therapeutic uses beyond headache and pain.
A small study of patients with heart failure not caused by blocked arteries indicates that women, as well as men, may benefit from implantable cardioverter-defibrillators (ICD), reported researchers at the American Heart Association’s Scientific Sessions 2004.
An "old" drug has unique benefits for patients with acute myocardial infarction (AMI; commonly known as heart attack), a finding that may contribute to a new understanding of how heart attacks develop, according to an article in the September/October American Journal of Therapeutics.
Since she was a young girl, Sandra Moore, 46, of Glen Ellyn, Ill., had episodes every few months when her heart started racing.
Women who reported eating diets rich in oils containing alpha-linolenic acid (ALA) seemed to have a lower risk of dying from heart disease and sudden cardiac death than women whose diets are low in the plant-derived fatty acid, researchers reported at the American Heart Association’s Scientific Sessions 2004.