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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

416
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

514
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:
514
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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Updated: Jan 7, 2026

Identification of Neutrophil Extracellular Traps in Paraffin-Embedded Feline Arterial Thrombi using Immunofluorescence Microscopy
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猫の甲状腺機能亢進症における心血管異常

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
まとめ

高齢猫の甲状腺機能亢進症は、心拡大などの心臓の問題を一般的に引き起こします。甲状腺ホルモンレベルを正常化する治療は、これらの心臓の変化を元に戻し、心不全を防ぐことがよくあります。

科学分野:

  • 獣医学
  • 内分泌学
  • 心臓病学

背景:

  • 甲状腺機能亢進症は、高齢の猫集団において一般的な内分泌障害である。
  • この状態は二次的な心血管異常を頻繁に引き起こし、長期的な健康に影響を与える。
  • これらの心血管の変化と治療効果を理解することは、猫の患者管理にとって不可欠である。

研究 の 目的:

  • 猫の甲状腺機能亢進症に関連する心血管異常を調査すること。
  • これらの心血管の変化が治療後に元に戻るかどうかを評価すること。
  • 影響を受けた猫のための最適なモニタリングおよびスクリーニングプロトコルを確立すること。

主な方法:

  • 甲状腺機能亢進症の猫における心エコー検査所見のレビュー。
  • 治療前後の心臓の構造と機能の分析。
  • 甲状腺ホルモンレベルと心臓の状態との相関。

主要な成果:

  • 甲状腺機能亢進症の猫は一般的に心拡大、左室肥大、左房拡大を示す。
  • 心血管異常は、甲状腺ホルモンレベルの正常化により元に戻ることが多い。
  • 肥大型心筋症などの既存の状態は、心血管系の完全な回復を妨げる可能性がある。
キーワード:
NT-proBNP猫呼吸困難心エコー検査心不全肥大型心筋症胸水肺水腫

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High-Resolution Cardiac Positron Emission Tomography/Computed Tomography for Small Animals
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In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography
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Last Updated: Jan 7, 2026

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結論:

  • 甲状腺機能亢進症の猫の心血管の変化を監視するために、定期的な心エコー検査が推奨される。
  • 心臓病のある高齢猫の甲状腺機能亢進症のスクリーニングは非常に重要である。
  • 甲状腺機能亢進症の効果的な治療は、心不全の発症を防ぐことができる。