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Related Concept Videos

Ventilatory Modes01:14

Ventilatory Modes

Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure.
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Related Experiment Video

Updated: Jul 2, 2026

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Real-Time Biventricular Pressure-Volume Loops During Percutaneous Pulmonary Valve Implantation in Patients With RVOT

Heiner Latus1,2, Verena Schindler1, Julie Cleuziou3

  • 1Clinic for Congenital Heart Disease and Pediatric Cardiology (H.L., V.S., C.M., D.T., A.E., P.E., S.G.), German Heart Centre Munich.

Circulation. Heart Failure
|December 23, 2025
PubMed
Summary

Percutaneous pulmonary valve implantation (PPVI) acutely reduces right ventricular (RV) overload but causes a decline in RV contractility. The left ventricle (LV) adapts well, but long-term effects of PPVI on biventricular function require further study.

Keywords:
constriction, pathologicexercise tolerancepulmonary valvestroke volumeventricular dysfunction

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Area of Science:

  • Cardiology
  • Cardiac Surgery
  • Biomedical Engineering

Background:

  • Right ventricular (RV) outflow tract stenosis and pulmonary regurgitation (PR) impair RV and left ventricular (LV) function.
  • Percutaneous pulmonary valve implantation (PPVI) is a therapeutic option for these conditions.
  • Assessing acute biventricular functional changes post-PPVI is crucial for understanding its impact.

Purpose of the Study:

  • To evaluate the immediate effects of PPVI on the intrinsic myocardial function of both the right and left ventricles.
  • To analyze changes in ventricular elastance, compliance, arterial elastance, and ventriculoarterial coupling before and after PPVI.

Main Methods:

  • Twenty patients with RV outflow tract dysfunction underwent PPVI.
  • Biventricular pressure-volume loops were assessed using conductance catheter technique during cardiac catheterization.
  • Load-independent parameters of ventricular function and coupling were measured pre- and post-PPVI.
  • Cardiac MRI was used for biventricular volume and function quantification.

Main Results:

  • PPVI led to a significant decrease in RV elastance and pulmonary/systemic arterial elastance.
  • Right ventriculoarterial coupling showed no significant change post-PPVI.
  • LV intrinsic function and ventriculoarterial coupling remained unaffected, while systemic arterial elastance increased.
  • No significant changes in RV or LV compliance were observed.
  • Patients with significant PR exhibited lower baseline RV elastance and higher post-PPVI LV compliance.

Conclusions:

  • PPVI acutely reduces RV overload but is associated with an immediate decrease in RV contractility and inefficient ventriculoarterial coupling.
  • The LV demonstrates adaptive capacity to altered loading conditions post-PPVI without significant intrinsic functional changes.
  • Long-term implications of these acute biventricular responses following PPVI warrant further investigation.