TY  - JOUR
AU  - Platiša, Mirjana M.
AU  - Gal, Vera
AU  - Nestorović, Zorica
AU  - Leskošek-Čukalović, Ida
AU  - Despotović, Saša
AU  - Veljović, Mile
AU  - Petrović, Aleksandar
AU  - Rajković, Jovana
AU  - Djokić, Vladimir
AU  - Novaković, Radmila
AU  - Gojković-Bukarica, Ljiljana
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4580
AB  - BACKGROUND: /Aim. There are only several studies on the acute effect of alcoholic drinks intake on heart rhythm and this phenomenon is still not well understood. We wanted to examine whether linear and nonlinear measures of RR interval and QT interval series could quantify the effect of beer in healthy subjects. Methods. Eighteen young volunteers drank 500 mL of beer (21 g of ethanol). Electrocardiogram (ECG) recordings were taken in supine position: 20 minutes before (relaxation) and 60 minutes after drink intake. The RR interval series and the QT interval series were extracted from ECG and we calculated short-term (α1) and long-term (α2) scaling exponents and sample entropy (SampEn) for both series; low frequency (LF) and high frequency (HF) spectral components from RR interval series and QT variability (QTV). Blood pressure was measured every 10 minutes. Results. It was shown that beer induced changes in variability and correlation properties of these series. Immediate effect of beer intake was detected as a transient increase in the QT variability, heart rate and blood pressure. Delayed effects of beer were shortening of the RR and QT intervals and reduction of the HF spectral component. Beer intake also increased short-term scaling exponent (α1) of the RR time series and long-term scaling exponent (α2) of the QT time series. Conclusion. Our results suggest that acute effects of beer are reduced parasympathetic control of the heart and changed dynamic complexity of the ventricular repolarization.
AB  - Uvod/Cilj. Akutni efekat uzimanja alkoholnih pića na kardiovaskularne ritmove je fenomen koji još uvek nije dovoljno razjašnjen i u literaturi postoji svega nekoliko radova na tu temu. Cilj rada je bio da se ispita da li se linearnim i nelinearnim merama nizova RR i QT intervala može kvantifikovati akutni efekat male količine piva kod zdravih osoba. Metode. Osamnaest mladih zdravih muškaraca je pilo po 500 mL piva (21 g etanola). Elektrokardiogram (EKG) je beležen u ležećem položaju: 20 minuta pre (u relaksaciji) i 60 minuta neposredno posle uzimanja pića. Iz digitalizovanog zapisa EKG-a izdvojeni su nizovi RR i QT intervala. Iz oba niza smo izračunali kratkodometni (α1) i dugo-dometni skalirajući eksponent (α2), kao i entropiju uzorka (SampEn). Iz nizova RR intervala određene su spektralne komponente niskofrekventnih (LF) i visokofrekventnih (HF) opsega, a iz nizova QT intervala varijabilnost QT intervala (QTV). Krvni pritisak je bio meren svakih 10 minuta. Rezultati. Pokazali smo da pivo menja varijabilnost i korelacione osobine ovih nizova. Neposredni efekat uzimanja piva ogleda se u prolaznim povećanjima QT varijabilnosti, srčane frekvence i krvnog pritiska, a produženi u skraćenju dužine RR i QT intervala i smanjenju spektralne komponente HF. Uzimanje piva je takođe dovelo do porasta kratkodometnog skalirajućeg eksponenta (α1) RR niza i dugodometnog skalirajućeg eksponenta (α2) QT niza. Zaključak. Akutni efekat uzimanja piva je redukovana parasimpatička kontrola srca i izmenjena kompleksnost dinamike ventrikularne repolarizacije.
PB  - Vojnomedicinska akademija - Institut za naučne informacije, Beograd
T2  - Vojnosanitetski pregled
T1  - Changes in linear and nonlinear measures of RR and QT interval series after beer intake
T1  - Promene linearnih i nelinearnih mera nizova RR i QT intervala posle uzimanja piva
EP  - 1111
IS  - 12
SP  - 1107
VL  - 74
DO  - 10.2298/VSP150514316P
ER  - 

@article{
author = "Platiša, Mirjana M. and Gal, Vera and Nestorović, Zorica and Leskošek-Čukalović, Ida and Despotović, Saša and Veljović, Mile and Petrović, Aleksandar and Rajković, Jovana and Djokić, Vladimir and Novaković, Radmila and Gojković-Bukarica, Ljiljana",
year = "2017",
abstract = "BACKGROUND: /Aim. There are only several studies on the acute effect of alcoholic drinks intake on heart rhythm and this phenomenon is still not well understood. We wanted to examine whether linear and nonlinear measures of RR interval and QT interval series could quantify the effect of beer in healthy subjects. Methods. Eighteen young volunteers drank 500 mL of beer (21 g of ethanol). Electrocardiogram (ECG) recordings were taken in supine position: 20 minutes before (relaxation) and 60 minutes after drink intake. The RR interval series and the QT interval series were extracted from ECG and we calculated short-term (α1) and long-term (α2) scaling exponents and sample entropy (SampEn) for both series; low frequency (LF) and high frequency (HF) spectral components from RR interval series and QT variability (QTV). Blood pressure was measured every 10 minutes. Results. It was shown that beer induced changes in variability and correlation properties of these series. Immediate effect of beer intake was detected as a transient increase in the QT variability, heart rate and blood pressure. Delayed effects of beer were shortening of the RR and QT intervals and reduction of the HF spectral component. Beer intake also increased short-term scaling exponent (α1) of the RR time series and long-term scaling exponent (α2) of the QT time series. Conclusion. Our results suggest that acute effects of beer are reduced parasympathetic control of the heart and changed dynamic complexity of the ventricular repolarization., Uvod/Cilj. Akutni efekat uzimanja alkoholnih pića na kardiovaskularne ritmove je fenomen koji još uvek nije dovoljno razjašnjen i u literaturi postoji svega nekoliko radova na tu temu. Cilj rada je bio da se ispita da li se linearnim i nelinearnim merama nizova RR i QT intervala može kvantifikovati akutni efekat male količine piva kod zdravih osoba. Metode. Osamnaest mladih zdravih muškaraca je pilo po 500 mL piva (21 g etanola). Elektrokardiogram (EKG) je beležen u ležećem položaju: 20 minuta pre (u relaksaciji) i 60 minuta neposredno posle uzimanja pića. Iz digitalizovanog zapisa EKG-a izdvojeni su nizovi RR i QT intervala. Iz oba niza smo izračunali kratkodometni (α1) i dugo-dometni skalirajući eksponent (α2), kao i entropiju uzorka (SampEn). Iz nizova RR intervala određene su spektralne komponente niskofrekventnih (LF) i visokofrekventnih (HF) opsega, a iz nizova QT intervala varijabilnost QT intervala (QTV). Krvni pritisak je bio meren svakih 10 minuta. Rezultati. Pokazali smo da pivo menja varijabilnost i korelacione osobine ovih nizova. Neposredni efekat uzimanja piva ogleda se u prolaznim povećanjima QT varijabilnosti, srčane frekvence i krvnog pritiska, a produženi u skraćenju dužine RR i QT intervala i smanjenju spektralne komponente HF. Uzimanje piva je takođe dovelo do porasta kratkodometnog skalirajućeg eksponenta (α1) RR niza i dugodometnog skalirajućeg eksponenta (α2) QT niza. Zaključak. Akutni efekat uzimanja piva je redukovana parasimpatička kontrola srca i izmenjena kompleksnost dinamike ventrikularne repolarizacije.",
publisher = "Vojnomedicinska akademija - Institut za naučne informacije, Beograd",
journal = "Vojnosanitetski pregled",
title = "Changes in linear and nonlinear measures of RR and QT interval series after beer intake, Promene linearnih i nelinearnih mera nizova RR i QT intervala posle uzimanja piva",
pages = "1111-1107",
number = "12",
volume = "74",
doi = "10.2298/VSP150514316P"
}

Platiša, M. M., Gal, V., Nestorović, Z., Leskošek-Čukalović, I., Despotović, S., Veljović, M., Petrović, A., Rajković, J., Djokić, V., Novaković, R.,& Gojković-Bukarica, L.. (2017). Changes in linear and nonlinear measures of RR and QT interval series after beer intake. in Vojnosanitetski pregled
Vojnomedicinska akademija - Institut za naučne informacije, Beograd., 74(12), 1107-1111.
https://doi.org/10.2298/VSP150514316P

Platiša MM, Gal V, Nestorović Z, Leskošek-Čukalović I, Despotović S, Veljović M, Petrović A, Rajković J, Djokić V, Novaković R, Gojković-Bukarica L. Changes in linear and nonlinear measures of RR and QT interval series after beer intake. in Vojnosanitetski pregled. 2017;74(12):1107-1111.
doi:10.2298/VSP150514316P .

Platiša, Mirjana M., Gal, Vera, Nestorović, Zorica, Leskošek-Čukalović, Ida, Despotović, Saša, Veljović, Mile, Petrović, Aleksandar, Rajković, Jovana, Djokić, Vladimir, Novaković, Radmila, Gojković-Bukarica, Ljiljana, "Changes in linear and nonlinear measures of RR and QT interval series after beer intake" in Vojnosanitetski pregled, 74, no. 12 (2017):1107-1111,
https://doi.org/10.2298/VSP150514316P . .

TY  - JOUR
AU  - Novaković, Radmila
AU  - Radunović, Nebojša
AU  - Rajković, Jovana
AU  - Djokić, Vladimir
AU  - Petrović, Aleksandar
AU  - Ivković, Branka
AU  - Ćupić, Vitomir
AU  - Kanjuh, Vladimir
AU  - Helmut, Heinlev
AU  - Gojković-Bukarica, Ljiljana
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4292
AB  - Resveratrol is a phytoalexin produced in a number of plant species including grapes. The benefit of resveratrol to health is widely reported. Resveratrol has been found to promote relaxation of non-pregnant and pregnant uterus, but its mechanism of action is unclear. The aims of our study were to investigate the involvement of inwardly rectifying potassium channels (Kir) in inhibitory effects of resveratrol on three models of contractions of non-pregnant rat uterus: the spontaneous rhythmic contractions (SRC), oxytocin-elicited phasic contractions and tonic oxytocin-elicited contractions. Uterine strips were obtained from virgin female Wistar rats in oestrus. Strips were mounted into organ bath for recording isometric tension in Krebs-Ringer solution. Experiments followed a multiple curve design. In order to test the involvement of Kirchannels in a mechanism of action of resveratrol (1-100 μM),BaCl2 (1 mM),a antagonist of inwardly rectifying potassium channels was used. Resveratrol induced a concentration-dependent relaxation of all models of contractions. BaCl2 antagonized the response to resveratrolon SRC and oxytocin-elicited phasic contractions. Relaxation achieved by resveratrolon tonic oxytocin-elicited concentrations was insensitive to BaCl2.The antagonism of resveratrol effects by inwardly rectifying potassium channels antagonist suggests that Kir channels are involved in resveratrol action on phasic contractions of rat uterus. Inhibitory effect of resveratrol on tonic contractions did not include Kir channels.
PB  - Univerzitet u Beogradu - Fakultet veterinarske medicine, Beograd
T2  - Veterinarski glasnik
T1  - Wine polyphenol resveratrol inhibits contractions of isolated rat uterus by activation of smooth muscle inwardly rectifying potassium channels
EP  - 129
IS  - 3-4
SP  - 121
VL  - 70
DO  - 10.2298/VETGL1604121N
ER  - 

@article{
author = "Novaković, Radmila and Radunović, Nebojša and Rajković, Jovana and Djokić, Vladimir and Petrović, Aleksandar and Ivković, Branka and Ćupić, Vitomir and Kanjuh, Vladimir and Helmut, Heinlev and Gojković-Bukarica, Ljiljana",
year = "2016",
abstract = "Resveratrol is a phytoalexin produced in a number of plant species including grapes. The benefit of resveratrol to health is widely reported. Resveratrol has been found to promote relaxation of non-pregnant and pregnant uterus, but its mechanism of action is unclear. The aims of our study were to investigate the involvement of inwardly rectifying potassium channels (Kir) in inhibitory effects of resveratrol on three models of contractions of non-pregnant rat uterus: the spontaneous rhythmic contractions (SRC), oxytocin-elicited phasic contractions and tonic oxytocin-elicited contractions. Uterine strips were obtained from virgin female Wistar rats in oestrus. Strips were mounted into organ bath for recording isometric tension in Krebs-Ringer solution. Experiments followed a multiple curve design. In order to test the involvement of Kirchannels in a mechanism of action of resveratrol (1-100 μM),BaCl2 (1 mM),a antagonist of inwardly rectifying potassium channels was used. Resveratrol induced a concentration-dependent relaxation of all models of contractions. BaCl2 antagonized the response to resveratrolon SRC and oxytocin-elicited phasic contractions. Relaxation achieved by resveratrolon tonic oxytocin-elicited concentrations was insensitive to BaCl2.The antagonism of resveratrol effects by inwardly rectifying potassium channels antagonist suggests that Kir channels are involved in resveratrol action on phasic contractions of rat uterus. Inhibitory effect of resveratrol on tonic contractions did not include Kir channels.",
publisher = "Univerzitet u Beogradu - Fakultet veterinarske medicine, Beograd",
journal = "Veterinarski glasnik",
title = "Wine polyphenol resveratrol inhibits contractions of isolated rat uterus by activation of smooth muscle inwardly rectifying potassium channels",
pages = "129-121",
number = "3-4",
volume = "70",
doi = "10.2298/VETGL1604121N"
}

Novaković, R., Radunović, N., Rajković, J., Djokić, V., Petrović, A., Ivković, B., Ćupić, V., Kanjuh, V., Helmut, H.,& Gojković-Bukarica, L.. (2016). Wine polyphenol resveratrol inhibits contractions of isolated rat uterus by activation of smooth muscle inwardly rectifying potassium channels. in Veterinarski glasnik
Univerzitet u Beogradu - Fakultet veterinarske medicine, Beograd., 70(3-4), 121-129.
https://doi.org/10.2298/VETGL1604121N

Novaković R, Radunović N, Rajković J, Djokić V, Petrović A, Ivković B, Ćupić V, Kanjuh V, Helmut H, Gojković-Bukarica L. Wine polyphenol resveratrol inhibits contractions of isolated rat uterus by activation of smooth muscle inwardly rectifying potassium channels. in Veterinarski glasnik. 2016;70(3-4):121-129.
doi:10.2298/VETGL1604121N .

Novaković, Radmila, Radunović, Nebojša, Rajković, Jovana, Djokić, Vladimir, Petrović, Aleksandar, Ivković, Branka, Ćupić, Vitomir, Kanjuh, Vladimir, Helmut, Heinlev, Gojković-Bukarica, Ljiljana, "Wine polyphenol resveratrol inhibits contractions of isolated rat uterus by activation of smooth muscle inwardly rectifying potassium channels" in Veterinarski glasnik, 70, no. 3-4 (2016):121-129,
https://doi.org/10.2298/VETGL1604121N . .