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Related Concept Videos

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

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Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism,...
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Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

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Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
116
Decreased pulse rate01:14

Decreased pulse rate

735
Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with...
735
Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

135
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...
135
Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies01:22

Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies

283
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...
283
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

346
Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
346

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Novel coronavirus 19 (COVID-19) associated sinus node dysfunction: a case series.

Graham Peigh1, Marysa V Leya1, Jayson R Baman1

  • 1Division of Cardiology, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA.

European Heart Journal. Case Reports
|October 22, 2020
PubMed
Summary

This case series reports new-onset sinus node dysfunction (SND) in two patients with COVID-19. Potential causes include myocardial inflammation or direct viral infiltration, necessitating close monitoring for bradyarrhythmia.

Keywords:
BradycardiaCOVID-19Case seriesSARS-CoV-2Sinus node dysfunction

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Area of Science:

  • Cardiology
  • Infectious Diseases
  • Virology

Background:

  • COVID-19 is linked to cardiovascular issues, but sinus node dysfunction (SND) has not been previously reported.
  • This study investigates the clinical presentation, potential mechanisms, and outcomes of de novo SND in COVID-19 patients.

Observation:

  • Two patients with COVID-19 developed new-onset sinus bradycardia.
  • One patient also experienced accelerated idioventricular rhythm, indicating significant cardiac involvement.

Findings:

  • COVID-19-associated SND is a newly described phenomenon.
  • Possible mechanisms include direct viral effects on the heart or inflammatory responses.

Implications:

  • Patients with COVID-19 require close cardiac monitoring for bradyarrhythmias.
  • Early detection and management of SND in COVID-19 can prevent hemodynamic instability.