systolic function Dotaz Zobrazit nápovědu
- MeSH
- diastola MeSH
- dilatační kardiomyopatie patofyziologie MeSH
- dítě MeSH
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladiství MeSH
- srdeční komory patofyziologie MeSH
- systola MeSH
- Check Tag
- dítě MeSH
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladiství MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
BACKGROUND: Sedation is an essential part of clinical practice. Despite this fact, we still lack data describing the exact impact of sedation on heart function. PURPOSE: To compare the changes in heart function, induced after sedation with either midazolam or dexmedetomidine, using cardiac magnetic resonance imaging (MRI). METHODS: A total number of 30 volunteers were randomized into two groups: 15 participants in the midazolam group (MID) and 15 participants in the dexmedetomidine group (DEX). Every participant underwent a one-session cardiac MRI before and after sedation onset. The following parameters were recorded: left and right ventricle stroke volume (Ao-vol and Pul-vol resp.) and maximum fl ow velocity through the mitral valve during early (E-diast) and late diastole (L-diast). A monitor recorded values of mean blood pressure (MAP), pulse (P) and blood oxygen saturation (SpO2 ) in 5-minute intervals. RESULTS: Dexmedetomidine led to a statistically signifi cant decrease in Ao-vol (p = 0.006) and Pul-vol (p = 0.003), while midazolam decreased E-diast (p = 0.019) Ao-vol (p = 0.001) and Pul-vol (p = 0.01). The late diastolic fi lling was not infl uenced by the sedation technique. CONCLUSION: Both sedation regimens worsened the systolic function of both ventricles. Midazolam moreover attenuated early diastolic fi lling of the left ventricle (Tab. 3, Fig. 4, Ref. 19).
- MeSH
- analgosedace klasifikace metody škodlivé účinky MeSH
- dexmedetomidin * farmakologie škodlivé účinky terapeutické užití MeSH
- funkční vyšetření srdce klasifikace metody MeSH
- lidé MeSH
- magnetická rezonanční tomografie metody MeSH
- midazolam * farmakologie škodlivé účinky terapeutické užití MeSH
- minutový srdeční výdej účinky léků MeSH
- systola účinky léků MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- práce podpořená grantem MeSH
- randomizované kontrolované studie MeSH
The present experiments were performed to study the effects and time trends of different anesthetic agents on the left ventricular (LV) systolic function and heart rate by high-resolution echocardiography in mice. Ten male C57BL/6J mice were submitted to echocardiography imaging separated by 72-hour intervals under the following conditions: 1) conscious mice, 2) mice anesthetized with isoflurane (ISO, inhaled), 3) mice anesthetized with tribromoethanol (TBE, intraperitoneal), 4) mice anesthetized with chloral hydrate (CH, intraperitoneal), and 5) mice anesthetized with pentobarbital sodium (PS, intraperitoneal). The effect of ISO, TBE, CH, and PS on LV systolic function was measured at 0, 1, 2, 3, 4, 6, 8, and 10 min after anesthesia. The results showed that LV systolic function and heart rate (HR) of anesthetized mice were reduced significantly (P<0.05), compared with results in the same mice studied in the conscious state. In addition, the results indicated that the anesthetic with the least effect on LV function was CH, and followed by TBE, PS, ISO. We conclude that different anesthetic agents always depressed the HR and LV systolic function of mice, and, furthermore, the effects and time trends of different anesthetics on LV function are different. In echocardiographic experiments, we should choose proper anesthetic agents according to the experimental requirements.
- MeSH
- anestetika toxicita MeSH
- dysfunkce levé srdeční komory chemicky indukované diagnostické zobrazování patofyziologie MeSH
- echokardiografie účinky léků metody MeSH
- funkce levé komory srdeční účinky léků fyziologie MeSH
- myši inbrední C57BL MeSH
- myši MeSH
- náhodné rozdělení MeSH
- srdeční frekvence účinky léků fyziologie MeSH
- systola účinky léků fyziologie MeSH
- tepový objem účinky léků fyziologie MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- myši MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH