Three cases of ruptured mitral valve chordae in the horse.

The research article presents a study on the clinical signs and implications of ruptured mitral valve chordae in horses, which is a serious cardiovascular condition.

Overview of the Study

• The paper covers a detailed observation of three case studies of horses suffering from ruptured mitral valve chordae.
• The research is based on clinical symptoms and signs exhibited by the horses, with a focus on sudden onset of distress and respiratory symptoms.
• Careful diagnosis methods based on auscultation, electrocardiogram, and post-mortem examination were employed to gather accurate data.

Clinical Signs and Symptoms

• The horses demonstrated a sudden onset of acute distress and displayed predominantly respiratory symptoms.
• The researchers noted a widespread pansystolic murmur, and in some cases the third cardiac sound was pronounced and unduly prolonged. This was associated with high volume blood flow during early ventricular filling in diastole.
• Though these sounds are typical of severe mitral regurgitation, they are not specific only to chordal rupture, implying the need for thorough investigation and diagnosis.

Diagnosis and Electrocardiogram (ECG) Reading

• An electrocardiogram was performed on the horses, which showed predominant backward spatial vectors during ventricular depolarisation.
• The identified condition, mitral valve chordae rupture, is known to cause left ventricular volume overload.
• In cases where signs of cardiovascular disturbance were observed, or where the condition was recently developed, pulmonary hypertension was expected.

Post-Mortem Examination

• The researchers indicated the necessity for careful post-mortem examination to avoid cutting through the mitral valve before having thoroughly assessed the chordal insertions.
• This meticulous approach ensures the preservation of crucial anatomical information that might offer further insights into the condition.