Right ventricular function
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Right-ventricular (RV) function has both diagnostic and prognostic relevance; thus the ability to accurately evaluate and quantify the RV is critical. Nuclear techniques provide an accurate and reproducible assessment of RV systolic function. Additionally, nuclear techniques can assess RV physiology, thus providing insight into the pathogenesis of common conditions affecting the RV. In this review, we describe the role of nuclear imaging in assessing RV systolic function, perfusion, and metabolism. RECENT FINDINGS: Nuclear techniques to quantify RV function have been available for many years, but newer methods to evaluate RV function are emerging. Recent investigations into the pathophysiology of RV failure from a variety of causes have identified RV ischemia and alterations in RV metabolism as major contributors. Because nuclear-imaging techniques also allow evaluation of RV ischemia and metabolism, nuclear imaging may allow a comprehensive assessment of RV function and physiology. SUMMARY: In addition to providing a reliable determination of RV systolic function, nuclear-imaging techniques are emerging as clinically useful tools to assess RV perfusion and metabolism. As these novel uses of nuclear imaging for RV assessment continue to be studied and validated across a variety of clinical settings, an expanded role of nuclear imaging of the RV is anticipated.
- MeSH
- funkce pravé komory srdeční fyziologie MeSH
- lidé MeSH
- srdeční komory metabolismus MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- přehledy MeSH
For years, the right ventricle (RV) has been deemed 'unnecessary', as shown by procedures such as Fontan surgery. More recently, right ventricular dysfunction has been recognized as a prognostic factor in many cardiovascular diseases. Supported by advances in echocardiography and MRI, assessment of right ventricular function and morphology has gained interest. The goal of this review is to offer a current clinical perspective on right ventricular function as assessed by MRI. RECENT FINDINGS: MRI has progressed towards a fast and reliable technique for assessing right ventricular morphology, volumes and function. Strain-encoded techniques and single breath-hold four-dimensional acquisition techniques are promising, but need to be confirmed in patient studies. Continuous improvement in postprocessing software has further reduced analysis time and effort. SUMMARY: Our understanding of right ventricular behavior even in complex heart disease has taken substantial benefit from modern cardiac MRI techniques. MRI imaging of the RV is patient-tailored, integrating right ventricular volumetric and functional analysis in a comprehensive approach, including assessment of cardiac morphology, myocardial tissue characteristics, flow patterns and great vessel anatomy. This approach provides the clinician a complete view, not only of the RV as such, but also of the RV being an essential part of the cardiopulmonary system.
- MeSH
- funkce pravé komory srdeční fyziologie MeSH
- kardiovaskulární nemoci diagnóza MeSH
- lidé MeSH
- magnetická rezonanční tomografie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- přehledy MeSH
- MeSH
- angiokardiografie MeSH
- echokardiografie MeSH
- lidé MeSH
- obstrukční plicní nemoci MeSH
- srdce - funkce komor MeSH
- srdeční komory patofyziologie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- přehledy MeSH
- MeSH
- diagnostické techniky kardiovaskulární metody MeSH
- diastola fyziologie MeSH
- echokardiografie metody MeSH
- funkce pravé komory srdeční MeSH
- lidé MeSH
- systola fyziologie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- přehledy MeSH
Dlouhodobá stimulace z hrotu pravé komory srdeční způsobuje asynchronní komorovou aktivaci a kontrakci a zhoršuje funkci levé komory srdeční. Septální stimulace pravé komory ve srovnání s apikální stimulací pravé komory umožňuje fyziologičtější aktivaci komor. Tento článek podává přehled studií srovnávajících alternativní stimulaci pravé komory a shrnuje informace o anatomii septa pravé komory a způsobu zavedení stimulační elektrody.
Long-term right ventricular apical pacing produces asynchronous ventricular activation and contraction and is associated with left ventricular dysfunction. Right ventricular septal pacing compared to right ventricular apical pacing allows more physiological ventricular activation. The paper is an overview of studies comparing alternative right ventricular pacing sites and summarizes the anatomy of right ventricular septum and the techniques of right ventricular septal lead positioning.
- Klíčová slova
- trvalá kardiostimulace, alternativní stimulace pravé komory,
- MeSH
- funkce pravé komory srdeční MeSH
- Hisův svazek MeSH
- implantované elektrody MeSH
- kardiostimulace umělá metody MeSH
- klinické zkoušky jako téma MeSH
- komorová dysfunkce terapie MeSH
- lidé MeSH
- výsledek terapie MeSH
- výsledky a postupy - zhodnocení (zdravotní péče) MeSH
- Check Tag
- lidé MeSH
