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Myocarditis I: Introduction01:21

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Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
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Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
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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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Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
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Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
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Stress-induced cardiomyopathy.

Torrey A Boland1, Vivien H Lee, Thomas P Bleck

  • 11Department of Neurologic Sciences, Rush University Medical Center, Chicago, IL. 2Department of Neurosurgery, Rush University Medical Center, Chicago, IL. 3Department of Anesthesiology, Rush University Medical Center, Chicago, IL. 4Department of Internal Medicine, Rush University Medical Center, Chicago, IL.

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Summary
This summary is machine-generated.

Stress-induced cardiomyopathy, often seen after neurologic injury, mimics heart attacks but is reversible. Understanding its causes and treatments is crucial for critical care practitioners.

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Area of Science:

  • Cardiology
  • Neurology
  • Critical Care Medicine

Background:

  • Reversible stress-induced cardiac dysfunction is a frequent complication of acute stress states, particularly neurologic injuries.
  • This cardiac dysfunction can be mistaken for myocardial ischemia, impacting treatment and prognosis.
  • Critical care practitioners require knowledge of stress-induced cardiomyopathy's epidemiology, pathophysiology, and clinical presentation.

Purpose of the Study:

  • To review the epidemiology, pathophysiology, clinical characteristics, precipitating conditions, differential diagnosis, and proposed treatments for stress-induced cardiomyopathy.
  • To enhance understanding among critical care practitioners regarding this condition.

Main Methods:

  • A comprehensive MEDLINE database search was conducted from inception to August 2014.
  • Search terms included "tako-tsubo," "stress-induced cardiomyopathy," "neurogenic cardiomyopathy," "neurogenic stress cardiomyopathy," and "transient left ventricular apical ballooning syndrome."
  • Relevant references from identified articles were also reviewed.

Main Results:

  • Stress-induced cardiomyopathy most commonly affects postmenopausal women and can be triggered by emotional stress or neurologic injury.
  • Patients may present with symptoms mimicking acute coronary syndrome, including ECG changes and echocardiographic abnormalities.
  • Elevated cardiac troponin is common, and the etiology is linked to catecholamine release; differential diagnoses include myocardial infarction and myocarditis.

Conclusions:

  • Stress-induced cardiomyopathy is a significant condition that can mimic myocardial infarction.
  • Recognition is vital in patients with underlying stress states, especially neurologic injuries.
  • While typically resolving naturally, treatment involves sympathetic blockade and supportive care.