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Avoidance of AV-nodal-blocking medication, pacemaker. Second-degree atrioventricular block (AV block) is a disease of the electrical conduction system of the heart. It is a conduction block between the atria and ventricles. The presence of second-degree AV block is diagnosed when one or more (but not all) of the atrial impulses fail to conduct ...
Atrioventricular block. Atrioventricular block ( AV block) is a type of heart block that occurs when the electrical signal traveling from the atria, or the upper chambers of the heart, to ventricles, or the lower chambers of the heart, is impaired. Normally, the sinoatrial node (SA node) produces an electrical signal to control the heart rate.
Diagnostic method. Electrocardiography. Atrial flutter ( AFL) is a common abnormal heart rhythm that starts in the atrial chambers of the heart. [ 1] When it first occurs, it is usually associated with a fast heart rate and is classified as a type of supraventricular tachycardia. [ 2] Atrial flutter is characterized by a sudden-onset (usually ...
Heart block. Heart block ( HB) [ 1] is a disorder in the heart 's rhythm due to a fault in the natural pacemaker. [ 2] This is caused by an obstruction – a block – in the electrical conduction system of the heart. Sometimes a disorder can be inherited. Despite the severe-sounding name, heart block may cause no symptoms at all in some cases ...
Rapid Interpretation of EKG's is a best-selling textbook for over 30 years [1] that teaches the basics of interpreting electrocardiograms. It adopts a simplistic fill-in-the-blank style [2] and is suited for medical students and junior residents. [1] The book was written by Dale Dubin, M.D., a plastic surgeon and convicted felon, [3] who has ...
Junctional rhythm. Junctional rhythm also called nodal rhythm[ 2] describes an abnormal heart rhythm resulting from impulses coming from a locus of tissue in the area of the atrioventricular node (AV node), [ 3] the "junction" between atria and ventricles. Under normal conditions, the heart's sinoatrial node (SA node) determines the rate by ...
Diagnosis. A bundle branch block can be diagnosed when the duration of the QRS complex on the ECG exceeds 120 ms. A right bundle branch block typically causes prolongation of the last part of the QRS complex and may shift the heart's electrical axis slightly to the right. The ECG will show a terminal R wave in lead V1 and a slurred S wave in ...
Ventricular fibrillation ( V-fib or VF) is an abnormal heart rhythm in which the ventricles of the heart quiver. [ 2] It is due to disorganized electrical activity. [ 2] Ventricular fibrillation results in cardiac arrest with loss of consciousness and no pulse. [ 1] This is followed by sudden cardiac death in the absence of treatment. [ 2]
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