Search Results
References 1 Gorgels AP, Engelen DJ, Wellens HJ. Lead aVR, a mostly ignored but very valuable lead in clinical electrocardiography. J Am Coll Cardiol. 2001; 38: 1355
aVR lead and diffuse ST segment depressions in all other derivations (Fig. 1b ) . His blood pressure was 90/50 mmHg and heart rate was 100 beats/min. Transthoracic echocardiography revealed severe aortic regurgitation, dilated ascending aorta with a
Abstract
The guided thermal neutron beam at 100 MW Dhruva research reactor facility of Bhabha Atomic Research Centre (BARC) was used to carry out prompt gamma-ray neutron activation analysis (PGNAA). The prompt k 0-factors have been determined for the isotopes of the elements H, B, K, Co, Cu, Ca, Ti, Cr, Cd, Ba, Hg and Gd with respect to 1951 keV gamma-line of 36Cl. The prompt k 0-factors for H, Cl and Cu were also measured with respect to the 1381 keV gamma-line of 49Ti. Different samples like NH4Cl, Ti metal, cobalt chloride and other stoichiometric compounds and pure metals were used for this purpose. Prompt gamma-rays were accumulated using a 22% HPGe detector connected to a PC based 8k MCA in single mode counting. The energy calibration in the range of 100–8500 keV was carried out using gamma-rays from 152Eu and 60Co, and the prompt gamma-rays from 36Cl whereas the absolute detection efficiency for this energy range was determined using 152Eu and prompt gamma-rays from 36Cl and 49Ti.
Minimálinvazív aortabillentyű-beültetés során nyert kezdeti tapasztalataink
Minimally invasive aortic valve surgery – early experiences
Bevezetés: A társadalom elöregedése és a vizsgálómódszerek javulása következtében az aortabillentyű-szűkület az egyik leggyakrabban diagnosztizált felnőttkori, szerzett szívbetegség. Különböző műtéti technikák alakultak ki, amelyek kivitelezéséhez a standard median sternotomiából végzett feltárás vált gyakorlattá. A kardiológia intervenciós technikáinak gyors fejlődése arra ösztönzi a szívsebészeti tevékenységet, hogy ugyanazt a műtéti minőséget az invazivitás csökkentése mellett nyújtsa. Célkitűzés: Célunk a vizsgált időszakban a teljes, median sternotómiából végzett aortabillentyű-műtét (AVR) és a partialis sternotomiából (mini-AVR) végzett, izolált aortabillentyű-műtétek összehasonlítása a pre-, intra- és posztoperatív eredmények tekintetében. Betegek és módszer: Kutatásunkban a Gottsegen György Országos Kardiovaszkuláris Intézetben végzett izolált aortabillentyű-műtéteket vizsgáltuk 2019. január és 2020. március között (99 AVR és 151 mini-AVR). Mini-AVR során a szegycsontot J-ministernotomiával csak a III. vagy IV. bordaközig nyitjuk meg, míg a klasszikus feltárás során a szegycsontot teljes hosszában választjuk szét. Eredmények: A vérfelhasználás (egység) (AVR: 2,90 [2,90]; mini-AVR: 1,85 [2,12]; p<0,05), a kórházban eltöltött napok száma (AVR: 9,75 [2,99]; mini-AVR: 8,85 [2,85]; p<0,05) és a műtéti idő hossza (perc) (AVR: 148,49 [34,4]; mini-AVR: 134,6 [34,8]; p<0,05) tekintetében kedvezőbb volt a mini-AVR-csoport. A preoperatív változók tekintetében nem volt homogén a két csoport, ezért korrigáltuk az erős prediktív változókat. Ezáltal a biostatisztikai értelemben vett szignifikanciaszintek eltűntek, azonban egyértelmű lett a trend a minimálinvazív műtétek javára. Következtetés: Vizsgálatunk során a mini-AVR-műtét költséghatékonyabb beavatkozásnak bizonyult a kisebb műtéti trauma, a csökkent vérfelhasználás és a rövidebb műtéti idő tekintetében a standard beavatkozással szemben. Orv Hetil. 2022; 163(35): 1394–1401.
To determine the effects of dietary calcium deficiency on the heart function of broiler chickens based on electro- and echocardiography, chicks were reared for 42 days and fed rations with different amounts of calcium. At 28 and 42 days of age, electrocardiographic and echocardiographic parameters were assessed. There were significant reductions of R wave amplitude (leads II and aVR) in the Ca-deficient group II at 42 day of age as compared to the control. S wave amplitudes were decreased in most leads but the decrease was significant (P < 0.05) only at 28 days (lead aVL, Ca-deficient group I) and 42 days (leads III, aVR, aVF, Ca-deficient groups I and II). T wave amplitudes were significantly (P < 0.05) decreased at 42 days (leads II, aVR and aVF) in the Ca-deficient group II compared to the control group. Variations in QT, ST and RR intervals were insignificant in the Ca-deficient groups compared with the control. There was a significant (P < 0.05) increase in left ventricular diameter at end-systole and a reduction of left ventricular fractional shortening in the Ca-deficient group II at 28 and 42 days as compared to the controls. Right ventricular fractional shortening was significantly (P < 0.05) decreased only in the Ca-deficient group II at 42 days of age. These results suggest that dose-dependent dietary calcium deficiency alters variations in electro- and echocardiographic parameters which could reflect decreased cardiac function in growing broiler chickens.
To clarify the effect of orally administered citric acid on the electrocardiographic parameters of pulmonary hypertensive broilers, chicks were reared at high altitude and treated with citric acid for 45 days. Increase of cardiac indices such as right ventricle/total ventricles (RV/TV), RV/body weight and TV/body weight ratio was not observed in the treated groups as compared to the control groups. Decrease of S amplitude in the treated groups (leads II, III, aVF) was only significant (P < 0.05) at 45 days of age (leads II, aVF; 1.5 g/l of citric acid). There were significant reductions of T amplitude at 28 (lead aVR) and 36 days (lead aVL) and significant reductions of R wave at 28 (lead aVL, all doses of citric acid) and 45 days of age (lead aVR, 1 and 1.5 g/l citric acid) in the treated groups. The QRS interval was significantly higher at 28 (leads III and aVF), 36 (leads II, III and aVF, 1 g/l citric acid) and 45 days of age (leads II and aVF) in the treated groups. The QT interval was significantly (P < 0.05) increased at 28 and 45 days of age (lead aVL) and the RR interval also showed an increase at 28 (leads aVR and aVL) and 45 (lead aVL) days of age as compared to the controls. Our data indicate that citric acid modulates the induction of pulmonary hypertension at high altitude and this effect is detectable in the electrocardiographic parameters.
(AVR) and the power system stabilizer comprise the excitation control system. They are modeled and included in the system. Further simulations were carried out so as to ascertain their effect. 2.3 Simulation block diagrams The load frequency control
47 1567 1568 S.R. Anjaneyulu, A.V.R. Prasad , Phytochemistry 21 (1982) 2057–2060. Prasad A.V.R
Zhong-Qun, Z., Chong-Quan, W., Nikus, K. C., et al.: A new electrocardiogram finding for massive pulmonary embolism: ST elevation in leads aVR with ST depression in lead I and V 4 to V 6 . Am. J
Chem. Rev. 2006 106 3963 3986 A.V.R. Rao, G. Yenkatsuamy, A.D. Pendse
