Why the study?
The study was conducted to test ventriculo-arterial coupling as a marker of early right ventricular dysfunction in a model mimicking tetralogy of Fallot.
Does ventriculo-arterial coupling serve as a marker of early right ventricular dysfunction in a porcine model of tetralogy of Fallot?
Does ventriculo-arterial coupling serve as a marker of early right ventricular dysfunction in a porcine model of tetralogy of Fallot?
In a porcine model of tetralogy of Fallot, ventriculo-arterial coupling remains preserved despite early right ventricular dysfunction and decreased afterload.
We used a porcine model of sequential loading with pulmonary artery banding and transannular patch mimicking tetralogy of Fallot to test ventriculo-arterial coupling as a marker of early right ventricular dysfunction. Ventriculo-arterial coupling is preserved despite right ventricular dysfunction and afterload is decreased. Pulmonary regurgitation results in low afterload following pulmonary artery pressure drop during diastole. Early systolic ejection is increased and correlates with ventriculo-arterial coupling.
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Symakani et al. (2025) studied this question.
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