Last reviewed: November 2017
Last updated: November  2017

Summary

Definition

History and exam

Key diagnostic factors

  • hx of CAD
  • hx of hypertrophic cardiomyopathy
  • hx of idiopathic dilated cardiomyopathy
  • presence of other risk factors
  • asymptomatic presentation
  • tachycardia

Other diagnostic factors

  • palpitations
  • dizziness
  • lightheadedness
  • pre-syncope
  • syncope

Risk factors

  • CAD
  • left ventricular systolic dysfunction
  • hypertrophic cardiomyopathy
  • idiopathic dilated cardiomyopathy
  • long QT syndrome
  • Brugada's syndrome
  • electrolyte imbalance
  • drug toxicity
  • Chagas' disease and other cardiomyopathies
  • catecholaminergic polymorphic VT
  • FHx of sudden death
  • mental or physical stress

Diagnostic investigations

1st investigations to order

  • ECG
  • electrolyte panel
  • troponin
  • CK-MB
Full details

Investigations to consider

  • 24-hour ambulatory ECG monitoring
  • echocardiogram
  • cardiac catheterisation
  • cardiac MRI with gadolinium
  • electrophysiological testing
  • stress testing
  • genetic screening
Full details

Treatment algorithm

Contributors

Authors VIEW ALL

Fred Kusumoto

Professor of Medicine

Mayo Medical School

Division of Cardiovascular Diseases

Department of Medicine

Mayo Clinic Florida

Jacksonville

FL

Disclosures

FK declares that he has no competing interests.

Professor Kusumoto would like to gratefully acknowledge Dr Ronald R. Butendieck Jr, a previous contributor to this monograph. RRB declares that he has no competing interests.

Peer reviewers VIEW ALL

Cardiology Fellow

Adult Cardiovascular Fellowship

Department of Cardiology

Chicago Medical School (CMS) and affiliated hospitals

Chicago

IL

Disclosures

SS declares that he has no competing interests.

Consultant Cardiologist and Chair

Arrhythmias

Royal Brompton & Harefield NHS Trust

Hon. Senior Lecturer

Imperial College

London

UK

Disclosures

VM declares that he has no competing interests.

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