Narrow Complex Tachycardia
Narrow Complex Tachycardia: two main categories: 1. AV node independent; 2. AV node dependent
Category Medical Specialty
Myocarditis
Myocarditis: inflammation of heart muscle -> lymphocytic and fibroblast infiltration + myocyte necrosis
Myocardial Stunning
Myocardial Stunning = temporary cardiac muscle dysfunction secondary to an insult (ischaemia, hypoxia, very high afterload); can be focal or global
Murmurs and Valve Lesions
Description of Cardiac murmurs and valvular lesions;
Lown-Ganong-Levine Syndrome
Lown–Ganong–Levine syndrome (LGL): Proposed pre-excitation syndrome. Accessory pathway composed of James fibres. Characteristic ECG findings of short PR interval (<120ms); normal P wave axis; normal/narrow QRS morphology in the presence of paroxysmal tachyarrhythmias
Long QT Syndrome
Long QT Syndrome (LQTS) produces prolonged ventricular repolarisation -> predisposes to malignant ventricular arrhythmias
Left Ventricular Outflow Tract Obstruction (LVOTO)
Left Ventricular Outflow Tract Obstruction (LVOTO) and systolic anterior motion (SAM) of the mitral valve
Junctional Ectopic Tachycardia
Junctional Ectopic Tachycardia: rare; congenital or post surgery for congenital heart disease; abnormal automaticity within the His bundle; high mortality rate (35%)
Implantable Cardioverter Defibrillators (ICDs)
Implantable Cardioverter Defibrillators (ICDs): implantable device defibrillator +/- pacemaker (counter shock vector is from RV -> both SVC)
Hypertrophic Cardiomyopathy
Hypertrophic cardiomyopathy (HCM) is one of the most common inherited cardiac disorders (affecting ~ 1 in 500 people) and is the number one cause of sudden cardiac death in young athletes. Annual mortality is estimated at 1-2 %.
Heart Transplant Patient
Criteria for heart transplant recipient
Heart Failure Literature Summaries
Follath F, et al; Steering Committee and Investigators of the Levosimendan Infusion versus Dobutamine (LIDO) Study. Efficacy and safety of intravenous levosimendan compared with dobutamine in severe low-output heart failure (the LIDO study): a randomised double-blind trial. Lancet. 2002 Jul…