Related Experiment Video
Updated: May 10, 2026

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
Published on: July 5, 2021
Brugada syndrome with elevated cardiac biomarkers
Fatima AlKendi1, Mujgan Jamil, Anwer Qureshi
1Division of Medicine, Department of Medicine, Tawam Hospital, Al Ain, United Arab Emirates.
This case highlights a Brugada syndrome diagnosis in a patient presenting with chest pain and palpitations. Ajmaline testing confirmed the condition, differentiating it from acute myocardial infarction.
Area of Science:
- Cardiology
- Clinical Electrophysiology
Background:
- Brugada syndrome is a rare genetic disorder affecting the heart's electrical system.
- It is characterized by specific ECG abnormalities and an increased risk of sudden cardiac death.
Observation:
- A 45-year-old male presented with palpitations, presyncope, and chest pain.
- ECG revealed a type 2 Brugada pattern (rsr' in V1, saddle-back ST elevation in V2).
- Telemetry showed asymptomatic non-sustained polymorphic ventricular tachycardia.
Findings:
- Ajmaline challenge test confirmed Brugada syndrome.
- Cardiac biomarkers suggested myocardial infarction, but coronary angiography showed normal coronaries.
- Echocardiogram revealed normal cardiac structure and function, ruling out myopericarditis.
Implications:
- This case underscores the importance of recognizing Brugada ECG patterns in patients with concerning symptoms.
- Differentiating Brugada syndrome from acute coronary syndromes is crucial for appropriate management.
- The case highlights the utility of ajmaline challenge testing for diagnosis.
- Management decisions, including the recommendation for an automated intracardiac defibrillator, require careful consideration of patient factors and preferences.
Related Concept Videos
Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
Blood Studies for Cardiovascular System I: Cardiac Biomarkers
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
Cardiomyopathy III: Hypertrophic Cardiomyopathy
Acute Coronary Syndrome III: Diagnostic Studies
Cardiomyopathy II: Dilated Cardiomyopathy
Aortic Regurgitation II: Clinical Features and Diagnostic Tests