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- Atrial FibrillationIntroduction Atrial fibrillation is a common supraventricular tachycardia Incidence in Canada is up to 4.5% per year, with lifetime risk estimated at 25% among those older than 40 years of age Evaluation of the patient involves: Determining the underlying cause of atrial fibrillation and modifying
- Bradycardia – DiagnosisAcronyms HR – Heart Rate SA – Sinoatrial AV – Atrioventricular RA – Right Atrium SVC – Superior Vena Cava LAD – Left Anterior Descending R/L BBB – Right / Left Bundle Branch Block Introduction For management, see “Management of Bradycardia” Bradyarrhythmia is defined as a HR<60bpm. The etiology of b
- Bradycardia – ManagementFor diagnosis, see “Diagnosis of Bradycardia” Acronyms ACLS – Acute Cardiovascular Life Support ASD – Atrial Septal Defect AV – Atrioventricular CRT – Cardiac Resynchronization Therapy EP Study – Electrophysiological Study ICD – Implantable Cardioverter Defibrillator LVEF – Left Ventricular Ejection
- Cardiac Implantable Devices for ResidentsAbbreviations PPM – Pacemaker CRT – Cardiac Resynchronization Therapy ICD – Implantable Cardioverter Defibrillator RV – Right Ventricle LV – Left Ventricle RA – Right Atrium Basics of Devices Most devices have 2 components: Pulse Generator and Leads The leads are composed of silicone or polyurethane
- Cardiac Syncope ManagementIntroduction Please see original article: Syncope for full details on the differential and diagnostic approach to syncope Details regarding pacing will be discussed in other topics, a general overview of indications for pacing in patients with cardiac syncope will be outlined below. Bradycardia rela
- Driving Guidelines for Arrhythmia/SyncopeAbbreviations ICD – Implantable cardiac defibrillator VF – Ventricular fibrillation VT – Ventricular tachycardia AV – Atrioventricular AF – Atrial fibrillation Introduction Syncope is a common condition associated with a wide spectrum of risk of recurrent episodes. Largely, syncope can be categoriz
- Narrow QRS Regular TachycardiaIntroduction Prerequisite Reading: Narrow QRS Tachycardia NOTE: The term “SVT – Supraventricular Tachycardia” refers to narrow-QRS regular tachycardia. Even though atrial fibrillation is “supraventricular”, it is not an SVT. Narrow QRS Regular Tachycardia Sinus Tachycardia Atrial Tachycardia Atri
- Narrow QRS TachycardiaIntroduction Required Reading: Introduction to Arrhythmia Diagnosis Narrow QRS tachycardia can be split into two categories: regular (also known as SVT or supraventricular tachycardia) and irregular. It is important to use an approach when assessing a narrow QRS tachycardia: describe the ECG, prese
- Sinus TachycardiaIntroduction Mechanism: Increased automaticity of the SA node Defined as sinus rate > 100 bpm Response to Adenosine Gradual slowing of the tachycardia and then re-acceleration Sinus nodal re-entry tachycardia will suddenly terminate ECG Characteristics Gradual onset & offset (driven largely by the a
- SyncopeIntroduction Syncope is defined as loss of consciousness due to cerebral hypoperfusion, characterized by a rapid onset, short duration, and spontaneous complete recovery. A good history and physical examination are critical in identifying causes of syncope. Approximately 40% of people faint at least
- Wide Complex Tachycardia – DiagnosisIntroduction For management, see “Management of Wide Complex Tachycardia” Wide complex tachycardia is defined as a rate of > 100 with QRS > 120ms. Wide QRS represents slow activation of the ventricles that does not use the rapid His-Purkinje system of the heart. There are 5 classic causes of wide co
- Wide Complex Tachycardia: ManagementIntroduction For ECG interpretation and diagnosis of wide complex tachycardia see “Diagnosis of Wide Complex Tachycardia” It is important to remember the 5 causes of wide complex tachycardia: CLASSIC CAUSES OF WIDE COMPLEX TACHYCARDIA Ventricular Tachycardia SVT with aberrancy (usually SVT with RBBB