What is the clinical evidence from this study?

Study design: Other. Population: Left ventricular hypertrophy. Intervention: Exercise (swimming) or abdominal aortic banding vs. Sedentary control. Primary outcome: Myocardial velocity gradient (MVG).

What does this research mean for the field?

Tissue Doppler imaging-derived myocardial velocity gradient is significantly lower in pathological pressure-overload left ventricular hypertrophy compared to physiological exercise-induced hypertrophy, providing a sensitive marker for early myocardial dysfunction. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

The aim is to evaluate the efficacy of myocardial velocity gradient using TDI in distinguishing between physiological and pathological left ventricular hypertrophy in rats.

April 2, 2002CirculationOpen Access

Tissue Doppler Imaging Differentiates Physiological From Pathological Pressure-Overload Left Ventricular Hypertrophy in Rats

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Key result

Tissue Doppler imaging-derived myocardial velocity gradient was significantly lower in rats with pressure-overload LVH compared to exercise LVH, detecting early myocardial dysfunction.

Why the study?

Does tissue Doppler imaging differentiate physiological from pathological pressure-overload left ventricular hypertrophy in rats?

Population

Wistar rats

Comparison

Physiological and pathological left ventricular… vs Sedentary rats

Design

Preclinical

Follow-up

Up to 9 months

Authors

GDGeneviève DérumeauxCardiac Imaging PMPaul MulderUniversité Paris-Sud VRVincent RichardKuban State University

Discussion

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Implication

Tissue Doppler may differentiate physiological from pathological LVH in rats; leaves open human translation and validation.

Key Points

The aim is to evaluate the efficacy of myocardial velocity gradient using TDI in distinguishing between physiological and pathological left ventricular hypertrophy in rats.
Groups of Wistar rats were allocated to sedentary, exercise, or abdominal aortic banding for 2 or 9 months.
Tissue Doppler imaging was used to measure left ventricular function, particularly MVG.
Systolic function was assessed through conventional parameters like left ventricular fractional shortening and dP/dt(max).
Rats with physiological LVH (exercise) and pathological LVH (2-month aortic banding) exhibited significant LVH.
MVG was significantly lower in rats with aortic banding compared to sedentary and exercise groups.
Recovery of MVG was complete after debanding at 2 months but remained impaired after 9 months.

Structured PICO

Does tissue Doppler imaging differentiate physiological from pathological pressure-overload left ventricular hypertrophy in rats?

Population

Wistar rats

Intervention

Physiological (exercise/swimming) and pathological (2-month or 9-month abdominal aortic banding) left ventricular hypertrophy models evaluated by tissue Doppler imaging (TDI)

Comparator

Sedentary rats

Outcome

Myocardial velocity gradient (MVG) measured across the left ventricular posterior wallsurrogate

Tissue Doppler imaging is more sensitive than conventional echocardiography for detecting early myocardial dysfunction in pathological pressure-overload LVH.

Cite This Study

Dérumeaux et al. (2002) studied Left ventricular hypertrophy. Exercise (swimming) or abdominal aortic banding vs. Sedentary control was evaluated on Myocardial velocity gradient (MVG). Tissue Doppler imaging-derived myocardial velocity gradient was significantly lower in rats with pressure-overload LVH compared to exercise LVH, detecting early myocardial dysfunction.

synapsesocial.com/papers/6a1740550ef68bc33a8d7447 https://doi.org/10.1161/01.cir.0000012943.91101.d7

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Tissue Doppler Imaging Differentiates Physiological From Pathological Pressure-Overload Left Ventricular Hypertrophy in Rats

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Tissue Doppler Imaging Differentiates Physiological From Pathological Pressure-Overload Left Ventricular Hypertrophy in Rats

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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