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Cardiomyopathy II: Dilated Cardiomyopathy01:30

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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 III: Hypertrophic Cardiomyopathy01:29

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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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The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
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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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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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Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
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Cognitive dysfunction in chronic Chagas disease cardiomyopathy.

Jesângeli Sousa Dias1, Amanda M Lacerda1, Rodrigo M Vieira-de-Melo1

  • 1Cardiomyopathy and Stroke Clinics, Federal University of Bahia, Salvador, BA, Brazil.

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Summary

Cognitive dysfunction is common in Chagas disease (CD) patients, particularly affecting memory recall. This finding highlights the need to consider cognitive health in Chagas disease research and patient care.

Keywords:
American trypanosomiasisChagas diseasecerebrovascular disorderscognition

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Area of Science:

  • Neurology
  • Cardiology
  • Infectious Diseases

Background:

  • Chagas disease (CD) is a significant cause of stroke in developing nations.
  • The cognitive impact of CD, especially in cardiomyopathy, is understudied.

Purpose of the Study:

  • To compare cognitive dysfunction frequency and patterns in Chagas disease cardiomyopathy (CDC) versus other cardiomyopathies (OC).

Main Methods:

  • 37 CDC and 42 OC patients were assessed using cognitive tests (MMSE, Rey's Complex Figure Test).
  • Participants had similar age, education, and cardiac function.
  • Logistic regression identified predictors of cognitive dysfunction.

Main Results:

  • 24% of CDC patients and 14% of OC patients showed cognitive dysfunction on MMSE.
  • Stroke history and digoxin use predicted MMSE scores; CD showed a trend.
  • Chagas disease patients had significantly worse delayed recall on Rey's test.

Conclusions:

  • Cognitive dysfunction is prevalent in Chagas disease.
  • Cognitive impairment should be an outcome measure in Chagas disease studies.