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Related Concept Videos

Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers01:12

Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers

Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of the heart's...
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias

Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...

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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
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Torsades de Pointes due to ischemic stroke.

Tarik Ocak1, Arif Duran, Umit Yasar Tekelioglu

  • 11Department of Emergency Medicine, 2Department of Anesthesiology and Reanimation, 3Department of Cardiology, 4Department of Radiology; Abant Izzet Baysal University, Medical School, Bolu, Turkey.

Medicinski Glasnik : Official Publication of the Medical Association of Zenica-Doboj Canton, Bosnia and Herzegovina
|July 30, 2013
PubMed
Summary

This case study highlights Torsades de Pointes, a dangerous heart rhythm, occurring secondary to ischemic cerebral stroke. It emphasizes the importance of considering cardiac abnormalities in stroke patients, even without prior heart disease history.

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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
06:01

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

Published on: August 18, 2015

Area of Science:

  • Cardiology
  • Neurology
  • Internal Medicine

Background:

  • Cardiac and cerebrovascular diseases are leading causes of mortality.
  • Thromboembolic events from cardiac arrhythmia contribute significantly to cerebral stroke.
  • Electrocardiography (ECG) may show abnormalities like ST-T wave changes in stroke patients without cardiac history.

Purpose of the Study:

  • To present an unusual case of Torsades de Pointes (TdP) triggered by ischemic cerebral stroke.
  • To underscore the potential link between neurological events and cardiac arrhythmias.
  • To raise awareness of cardiac manifestations in stroke patients.

Main Methods:

  • Case report detailing a patient with ischemic cerebral stroke.
  • Electrocardiographic (ECG) monitoring and analysis.
  • Review of relevant medical literature.

Main Results:

  • The patient experienced Torsades de Pointes, a specific type of ventricular tachycardia.
  • The cardiac event was identified as a consequence of the ischemic cerebral stroke.
  • ECG revealed characteristic abnormalities associated with TdP.

Conclusions:

  • Ischemic cerebral stroke can precipitate serious cardiac arrhythmias like Torsades de Pointes.
  • Thorough cardiac evaluation, including ECG, is crucial in patients presenting with ischemic stroke, irrespective of cardiac history.
  • This case illustrates a critical interplay between neurological and cardiovascular systems.