Cor pulmonale is right ventricle enlargement due to increased lung pressure. Chronic disease causes right ventricular hypertrophy, acute causes dilatation. Disease must originate in pulmonary circulation system
ECG records heart's electrical activity through repeated cardiac cycles. Electrodes placed on skin detect small electrical changes during heartbeat. Normal ECG shows P wave, QRS complex, T wave, and U wave
LQTS affects heart's repolarization, causing abnormally long QT interval. Affects 1 in 7,000 people, more common in females. First described in 1856, first ECG case in 1957
LVH is thickening of heart muscle in left ventricle. Most commonly occurs as pathological reaction to cardiovascular disease. Can result from increased afterload from aortic stenosis, hypertension, or mitral insufficiency. Associated with genes including OGN and osteoglycin
Left ventricle stiffens, making it difficult to relax between beats. Condition affects oxygen-rich blood delivery to body. Mild condition considered normal part of aging. Preserved ejection fraction means normal blood pumping percentage
Inherited condition affecting heart cell electrical activity. QT interval lasts longer than normal, affecting heart muscle recovery. Most people don't show symptoms but can develop dangerous arrhythmias