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Atrial flutter is characterized by a sudden-onset (usually) regular abnormal heart rhythm on an electrocardiogram (ECG) in which the heart rate is fast. Symptoms may include a feeling of the heart beating too fast, too hard, or skipping beats , chest discomfort, difficulty breathing , a feeling as if one's stomach has dropped, a feeling of ...
790.5 Other nonspecific abnormal serum enzyme levels; 790.6 Abnormal blood chemistry, other Iron overload disorder; 790.7 Bacteremia (not septicemia) 790.8 Viremia, unspecified; 790.9 Other nonspecific findings on examination of blood. 790.91 Abnormal arterial blood gases; 790.92 Abnormal coagulation profile; 790.93 Abnormal prostate specific ...
Left bundle branch block (LBBB) is a conduction abnormality in the heart that can be seen on an electrocardiogram (ECG). [1] In this condition, activation of the left ventricle of the heart is delayed, which causes the left ventricle to contract later than the right ventricle .
The criteria to diagnose a right bundle branch block on the electrocardiogram: The heart rhythm must originate above the ventricles (i.e., sinoatrial node, atria or atrioventricular node) to activate the conduction system at the correct point. The QRS duration must be more than 100 ms (incomplete block) or more than 120 ms (complete block). [9]
The ECG shows AV-junctional rhythm resulting in bradycardia at around 46 beats per minute. This ECG from the same patient shows atrial fibrillation at around 126 beats per minute. The most common complication of sinus node dysfunction is the development of tachycardia-bradycardia syndrome with abnormal atrial rhythms such as atrial tachycardia ...
Pre-excitation is caused by an abnormal electrical connection or accessory pathway between or within the cardiac chambers. Pre-excitation may not cause any symptoms but may lead to palpitations caused by abnormal heart rhythms. It is usually diagnosed using an electrocardiogram, but may only be found during an electrophysiological study. [2]
These abnormal rhythms start from either the atria or atrioventricular node. [2] They are generally due to one of two mechanisms: re-entry or increased automaticity. [3] Diagnosis is typically by electrocardiogram (ECG), Holter monitor, or event monitor. [4]
electrocardiogram Sinus bradycardia is a sinus rhythm with a reduced rate of electrical discharge from the sinoatrial node , resulting in a bradycardia , a heart rate that is lower than the normal range (60–100 beats per minute for adult humans).