What is the clinical evidence from this study?

Study design: Observational. Population: Right ventricular failure (n=69). Intervention: Right ventricular failure vs. No right ventricular failure. Primary outcome: Effective refractory period (ERP) (p=0.001).

What does this research mean for the field?

Pressure overload-induced right ventricular failure induces electrophysiologic remodeling in the left ventricle characterized by effective refractory period prolongation and conduction velocity slowing. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the electrophysiologic remodeling of the atrophic left ventricle resulting from pressure overload-induced right ventricular failure.

August 21, 2026Journal of the American College of CardiologyOpen Access

Electrophysiologic Remodeling of the Left Ventricle in Pressure Overload-Induced Right Ventricular Failure

Q: What are the key findings of this study?

Right ventricular failure in patients with CTEPH was associated with left ventricular effective refractory period prolongation (306 vs 268 ms; p=0.001) and conduction slowing.

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Key result

RV failure in CTEPH is linked to ~38 ms longer LV ERP and conduction slowing.

P=0.001
n=69

Why the study?

In pressure-induced RV failure, the LV develops dysfunction and atrophic remodeling, which is associated with electrophysiologic remodeling.

Comparison

Pressure-induced RVF vs controls/no RVF

Design

Translational animal and human observational study

Authors

MHMaxim HardziyenkaUniversity of Crete MCMaria E. CampianAmsterdam UMC Location University of Amsterdam AVArie O. VerkerkElectrophysiology

Discussion

Member takes

Implication

Translational study demonstrates electrophysiologic remodeling and conduction slowing in the left ventricle during right ventricular failure, highlighting cross-chamber cardiac dysfunction.

Key Points

To evaluate the electrophysiologic remodeling of the atrophic left ventricle resulting from pressure overload-induced right ventricular failure.
Assessed monocrotaline-induced right ventricular failure in rats (n = 25) compared to saline-injected controls (n = 18) using Langendorff epicardial mapping, patch-clamp electrophysiology, and molecular analyses.
Performed in vivo epicardial mapping of the left ventricle in patients with chronic thromboembolic pulmonary hypertension presenting with right ventricular failure (n = 10) versus without failure (n = 16).
Rats with right ventricular failure exhibited prolonged left ventricular effective refractory periods (60 ± 1 ms vs. 44 ± 1 ms; p < 0.001), slower conduction velocity (62 ± 2 cm/s vs. 70 ± 1 cm/s; p = 0.003), reduced Kcnip2 expression (0.07 ± 0.01 vs. 0.11 ± 0.02; p < 0.05), and a 24% reduction in Connexin-43 levels.
Patients with chronic thromboembolic pulmonary hypertension and right ventricular failure demonstrated left ventricular effective refractory period prolongation (306 ± 8 ms vs. 268 ± 5 ms; p = 0.001) and conduction slowing (53 ± 3 cm/s vs. 64 ± 3 cm/s; p = 0.005).

Study Design

Type

Observational (n=69)

PICO

Population

43 rats and 26 patients with chronic thromboembolic pulmonary hypertension evaluated for electrophysiologic remodeling of the left ventricle in the setting of right ventricular failure.

Exposure / Comparator

Right ventricular failure vs No right ventricular failure

Primary Outcome

Effective refractory period (ERP), p=0.001

Main Result

Absolute Event Rate: 306% vs 268%

p-value: p=0.001

Cite This Study

Hardziyenka et al. (2012) conducted an observational in Right ventricular failure (n=69). Right ventricular failure vs. No right ventricular failure was evaluated on Effective refractory period (ERP) (p=0.001). Right ventricular failure in patients with CTEPH was associated with left ventricular effective refractory period prolongation (306 vs 268 ms; p=0.001) and conduction slowing.

synapsesocial.com/papers/6a881805672ce563f4b20604 https://doi.org/10.1016/j.jacc.2012.01.063

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Implication

Translational study demonstrates electrophysiologic remodeling and conduction slowing in the left ventricle during right ventricular failure, highlighting cross-chamber cardiac dysfunction.

Electrophysiologic Remodeling of the Left Ventricle in Pressure Overload-Induced Right Ventricular Failure

Discussion

Member takes

Implication

Key Points

Study Design

PICO

Main Result

Cite This Study

Electrophysiologic Remodeling of the Left Ventricle in Pressure Overload-Induced Right Ventricular Failure

Discussion

Member takes

Implication

Key Points

Study Design

PICO

Main Result

Cite This Study

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