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Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

368
Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
368
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

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Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
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Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

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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...
360
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

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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...
416
Cardiovascular System Abnormal Findings II: Auscultation01:25

Cardiovascular System Abnormal Findings II: Auscultation

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Auscultation, an essential part of a heart examination, is done using a stethoscope. It provides crucial information about heart function and possible heart problems. Due to heart problems, abnormal sounds can be heard during systole or diastole. These sounds include S3 and S4 gallops, opening snaps, systolic clicks, and murmurs.
Abnormal Heart Sounds
Gallops:
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Cardiovascular System Abnormal Findings I: Inspection and Palpation01:29

Cardiovascular System Abnormal Findings I: Inspection and Palpation

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In a cardiovascular examination, inspection and palpation are crucial for identifying abnormalities.
Abnormal findings observed during an inspection
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Video Experimental Relacionado

Updated: Jan 7, 2026

Identification of Neutrophil Extracellular Traps in Paraffin-Embedded Feline Arterial Thrombi using Immunofluorescence Microscopy
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Anormalidades Cardíacas en el Hipertiroidismo Felino

Birgit van Zuiden1, Giorgia Santarelli1, Sara Galac1

  • 1Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 108, 3584 CM Utrecht, The Netherlands.

Veterinary sciences
|December 31, 2025
PubMed
Resumen

El hipertiroidismo en gatos mayores comúnmente causa problemas cardíacos como cardiomegalia. El tratamiento para normalizar los niveles de hormona tiroidea a menudo revierte estos cambios cardíacos, previniendo la insuficiencia cardíaca.

Palabras clave:
NT-proBNPgatosdisneaecocardiografíainsuficiencia cardíacacardiomiopatía hipertróficaderrame pleuraledema pulmonar

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Área de la Ciencia:

  • Medicina Veterinaria
  • Endocrinología
  • Cardiología

Sus antecedentes:

  • El hipertiroidismo es un trastorno endocrino prevalente en las poblaciones felinas de edad avanzada.
  • Esta condición frecuentemente conduce a anomalías cardíacas secundarias, afectando la salud a largo plazo.
  • La comprensión de estos cambios cardíacos y los efectos del tratamiento es vital para el manejo de pacientes felinos.

Objetivo del estudio:

  • Investigar las anomalías cardíacas asociadas con el hipertiroidismo en gatos.
  • Evaluar la reversibilidad de estos cambios cardíacos después del tratamiento.
  • Establecer protocolos óptimos de monitoreo y detección para gatos afectados.

Principales métodos:

  • Revisión de hallazgos ecocardiográficos en gatos hipertiroideos.
  • Análisis de la estructura y función cardíaca antes y después del tratamiento.
  • Correlación de los niveles de hormonas tiroideas con el estado cardíaco.

Principales resultados:

  • Los gatos hipertiroideos comúnmente presentan cardiomegalia, hipertrofia ventricular izquierda y dilatación auricular izquierda.
  • Las anomalías cardíacas son a menudo reversibles con niveles normalizados de hormonas tiroideas.
  • Las condiciones preexistentes como la cardiomiopatía hipertrófica pueden impedir la recuperación cardíaca completa.

Conclusiones:

  • Se recomienda la ecocardiografía de rutina para monitorear los cambios cardíacos en gatos hipertiroideos.
  • Es crucial la detección de hipertiroidismo en gatos mayores con cardiopatías.
  • El tratamiento efectivo del hipertiroidismo puede prevenir el desarrollo de insuficiencia cardíaca.