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Related Concept Videos

Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

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Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
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Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations01:19

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The pathophysiology of Acute Coronary Syndrome [ACD] involves several key processes:The main underlying cause of ACD is atherosclerosis, a chronic inflammatory disease characterized by the buildup of lipid-laden plaques within the coronary arteries.As the atherosclerotic plaque grows in the coronary artery, it may become unstable due to the formation of a lipid-rich core and a thin fibrous cap. Inflammatory cells within the plaque, such as macrophages, secrete enzymes that degrade the...
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Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

288
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...
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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...
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Acute Coronary Syndrome I: Introduction01:30

Acute Coronary Syndrome I: Introduction

265
Acute Coronary Syndrome (ACS) encompasses a spectrum of heart conditions caused by sudden obstruction of coronary arteries, typically resulting from the rupture of an atherosclerotic plaque and subsequent thrombus (blood clot) formation. This obstruction can lead to partial or complete blockage of blood flow, causing varying degrees of myocardial ischemia or infarction.ACS includes the following clinical entities:Unstable Angina (UA)Non-ST-Elevation Myocardial Infarction (NSTEMI)ST-Elevation...
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Dysrhythmias I: Introduction01:15

Dysrhythmias I: Introduction

330
Dysrhythmias refers to abnormalities in the heart's rhythm. They result from disruptions in the heart's electrical conduction system, which includes the sinoatrial(SA)node, atrioventricular(AV) node, the bundle of His, bundle branches, and Purkinje fibers.Definition and PathophysiologyDysrhythmias result from disorders of impulse formation, impulse conduction, or both. The heart contains specialized cells in the sinoatrial node, atrioventricular node, and the bundle of His and Purkinje fibers...
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Related Experiment Video

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Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
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Brugada syndrome clinical update.

Rhadames Rojas1, Risheek Kaul1, Daniel Frenkel1,2

  • 1Westchester Medical Center Health Network, Valhalla, NY, USA.

Hospital Practice (1995)
|March 17, 2021
PubMed
Summary

Brugada syndrome (BrS) is a heart condition causing dangerous arrhythmias, often seen in Asians. This review covers its causes, symptoms, and treatments to prevent sudden cardiac death.

Keywords:
ArrhythmiasBrugada syndromeelectrocardiographysudden cardiac death

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Area of Science:

  • Cardiology
  • Genetics
  • Electrophysiology

Background:

  • Brugada syndrome (BrS) is an inherited cardiac condition.
  • Characterized by specific ECG abnormalities (J-point elevation) and risk of ventricular arrhythmias.
  • Prevalence is higher in Asian populations (0.9%) versus worldwide (0.4%).

Purpose of the Study:

  • To review current hypotheses on Brugada syndrome pathophysiology.
  • To outline the clinical presentation spectrum.
  • To discuss strategies for preventing sudden cardiac death and managing recurrent arrhythmias.

Main Methods:

  • Literature review of Brugada syndrome.
  • Analysis of current hypotheses on pathophysiology.
  • Summary of clinical presentations and management strategies.

Main Results:

  • Brugada syndrome presents with J-point elevation and ST segment changes on EKG.
  • Arrhythmias can be spontaneous or induced by sodium channel blockers.
  • Effective management strategies focus on risk stratification and prevention.

Conclusions:

  • Brugada syndrome requires a comprehensive understanding of its genetic and molecular basis.
  • Early diagnosis and risk stratification are crucial for patient management.
  • Ongoing research aims to improve therapeutic interventions for BrS patients.