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The ECG leads: Electrodes, limb leads, chest (precordial) leads and the 12-Lead ECG

…By placing electrodes on the skin it is possible to detect these electrical currents. The electrocardiograph (ECG machine) compares, amplifies and filters the electrical potential…

Pre-excitation, Atrioventricular Reentrant (Reentry) Tachycardia (AVRT), Wolff-Parkinson-White (WPW) syndrome

…This manifests with three features on the ECG and the combination of these features are unique to pre excitation: ECG features of pre excitation Short…

Supraventricular and intraventricular conduction defects in myocardial ischemia and infarction

…bundle branch block and ischemia/infarction). Studies demonstrate that individuals with acute myocardial infarction who do not display bundle branch block on the arrival ECG…

Management and treatment of AV block (atrioventricular blocks)

Conduction defects ECG Management and treatment of AV blocks (AV block 1, 2 & 3) Evaluation of patients with suspected AV blocks requires a thorough medical…

Aberrant ventricular conduction (aberrancy, aberration)

…early – while conduction fibers are still refractory – the impulse might be blocked. This is a frequent finding among healthy individuals and in those with heart…

Digoxin - ECG changes, arrhythmias, conduction defects & treatment

…heart rate) and also slows conduction over the atrioventricular (AV) node. The most classical ECG finding is generalized ST segment depressions with curved ST segment…

Left Bundle Branch Block: ECG criteria and clinical implications

…with predominantly negative QRS complexes (such as V1 and V2) [7]. Etiology and Mechanisms LBBB may result from lesser degrees of conduction delay within the…

Intraventricular conduction delay: bundle branch blocks & fascicular blocks

…and synchronized activation of the ventricles, conduction defects will typically cause abnormal ventricular activation (i.e. contraction). The significance of this will depend on the…

Isoprenaline and Dopamine Infusions for Bradycardia

…and cause ventricular fibrosis, thereby increasing the risk of ventricular arrhythmias. Clinical Presentation and Symptoms Patients with bradycardia or intermittent conduction disorders frequently present with…

Atropine: Dosing in Bradycardia and Its Limitations

…may be associated with hemodynamic compromise. More broadly, bradyarrhythmic arrest and asystole represent severe manifestations of impulse generation or conduction failure. The pathophysiology of these…

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