Related Experiment Video
Updated: Feb 4, 2026

Transesophageal Atrial Burst Pacing for Atrial Fibrillation Induction in Rats
Published on: February 14, 2022
A Case of Lyme Carditis Presenting with Atrial Fibrillation
Peter J Kennel1, Melvin Parasram2, Daniel Lu3
1Department of Medicine, Weill Cornell Medicine, New York, NY, USA.
Insights
This case study highlights an unusual presentation of Lyme carditis in a young man, involving atrial fibrillation and AV block. Prompt antibiotic treatment successfully resolved these cardiac arrhythmias.
Area of Science:
- Cardiology
- Infectious Diseases
- Electrophysiology
Background:
- Lyme carditis, a cardiac manifestation of Lyme disease, can present with various atrioventricular (AV) conduction abnormalities.
- Atrial fibrillation is an uncommon presentation of Lyme carditis.
Abstract:
We report a case of a 20-year-old man who presented to our institution with a new arrhythmia on a routine EKG. Serial EKG tracings revealed various abnormal rhythms such as episodes of atrial fibrillation, profound first degree AV block, and type I second degree AV block. He was found to have positive serologies for Borrelia burgdorferi. After initiation of antibiotic therapy, the atrial arrhythmias and AV block resolved. Here, we present a case of Lyme carditis presenting with atrial fibrillation, a highly unusual presentation of Lyme carditis.
Related Concept Videos
Amyloid Fibrils
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid Fibrils
Fibril-associated Collagen
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
Structural Protein Function
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
Globular and Fibrous Proteins
Globular proteins are also known as spheroproteins and typically are approximately round in shape. They contain a mix of amino acid types and contain differing sequences in their primary structures. Globular proteins have many different functions, such as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be...

