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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

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An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
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Electrocardiogram Fundamentals01:28

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Introduction
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin...
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Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

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Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
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Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies01:22

Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies

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The key clinical manifestations of Rheumatic heart disease (RHD) include several distinct cardiac symptoms.Carditis, a hallmark of acute rheumatic fever, involves inflammation of the heart's endocardium, myocardium, and pericardium. Chronic RHD often results from recurrent episodes of carditis. Its symptoms include the following:Murmurs are caused by valvular damage, especially to the mitral and aortic valves. Mitral stenosis or regurgitation is common, with characteristic heart murmurs...
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Exercise Stress Test01:26

Exercise Stress Test

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Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
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Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

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Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
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Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function
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Electrocardiogram as a Lyme Disease Screening Test.

Desiree N Neville1, Mark E Alexander2, Jonathan E Bennett3

  • 1Division of Pediatric Emergency Medicine, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA.

The Journal of Pediatrics
|July 15, 2021
PubMed
Summary
This summary is machine-generated.

Electrocardiogram (ECG) findings of carditis, particularly atrioventricular (AV) block, are linked to Lyme disease diagnoses in children. This suggests ECG can aid in early Lyme disease management.

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Area of Science:

  • Pediatric Cardiology
  • Infectious Diseases
  • Diagnostic Biomarkers

Background:

  • Lyme disease diagnosis can be challenging, especially in children presenting with non-specific symptoms.
  • Electrocardiograms (ECGs) are commonly obtained during evaluations for potential Lyme disease.

Purpose of the Study:

  • To investigate the association between electrocardiographic (ECG) evidence of carditis and confirmed Lyme disease diagnoses.
  • To determine if ECG findings can serve as a diagnostic biomarker for Lyme disease.

Main Methods:

  • Prospective cohort study of 546 children evaluated for Lyme disease across 8 centers.
  • ECGs were reviewed for carditis, with logistic regression used to assess associations with Lyme disease and atrioventricular (AV) block.

Main Results:

  • 214 children (39%) were diagnosed with Lyme disease.
  • 42 children showed ECG evidence of carditis, including 24 with atrioventricular (AV) block.
  • ECG evidence of carditis (OR 2.3) and AV block (OR 4.7) were significantly associated with Lyme disease diagnosis.

Conclusions:

  • ECG findings of carditis, especially AV block, are associated with Lyme disease diagnoses in children.
  • ECG can function as a valuable diagnostic biomarker to guide initial Lyme disease management while awaiting test results.