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Troponin I in koronarna anatomija pri bolnikih z nenadnim srčnim zastojem
ID Berden, Jernej (Author), ID Noč, Marko (Mentor) More about this mentor... This link opens in a new window

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Abstract
Namen dela: Pri večini bolnikov po srčnem zastoju izven bolnišnice (OHCA) ob sprejemu potrdimo akutno poškodbo miokarda. Namen dela je bil opredeliti dinamiko visoko-občutljivega srčnega troponina I (cTnI) in z njo povezan obseg poškodbe miokarda oziroma miokardnega infarkta po OHCA pri bolnikih z različnimi stopnjami koronarne bolezni. Metode: Vključili smo 159 zaporednih komatoznih bolnikov po srčnem zastoju izven bolnišnice, pri katerih je bila opravljena urgentna koronarografija. Na podlagi koronarografskega izvida smo bolnike razdelili v skupine z akutno trombotično lezijo (skupina A), stabilno obstruktivno koronarno boleznijo (skupina B) ter neobstruktivno boleznijo oz. brez koronarne bolezni (skupina C). Ob sprejemu ter 3, 6, 12, 18, 24, 36 in 48 ur kasneje smo odvzeli vzorec krvi za določitev vrednosti visoko-občutljivega cTnI, izračunali smo površino pod krivuljo in določili optimalno vrednost cTnI za napoved akutne trombotične lezije. Rezultati: Dvig spojnice ST (STEMI) v sprejemnem EKG je bil v skupini A prisoten pri 65 % bolnikov, v skupni B pri 26 % bolnikov in v skupini C pri 11 % bolnikov (p < 0.001). cTnI, ki je bil ob sprejemu v skupinah A, B in C 0,88 ng/ml, 0,44 ng/ml in 0,19 ng/ml (p < 0.001), je v naslednjih urah porasel do največ 63,96 ng/ml, 10,00 ng/ml in 2,35 ng/ml (p < 0.001). Med bolniki v skupini A je bil cTnI pomembno višji pri tistih z akutno popolno zaporo koronarne arterije v primerjavi z bolniki s spontano reperfuzijo v času urgentne koronarografije. Pri bolnikih brez akutne trombotične lezije je najvišja vrednost cTnI korelirala s časom trajanja oživljanja na terenu, številom defibrilacij in celokupnim odmerkom prejetega adrenalina. Ob vrednosti sprejemnega TnI več kot 0,46 ng/ml je bila občutljivost za prisotnost akutne trombotične koronarne lezije 64 %, specifičnost pa 60 %. Sklepi: Pri bolnikih po srčnem zastoju je pomembna akutna poškodba miokarda, ugotovljena z visokimi vrednostmi cTnI, povezana s prisotnostjo akutne trombotične koronarne lezije, še posebej, če je koronarna arterija ob urgentni koronarografiji popolnoma zaprta. Pri bolnikih s stabilno in neobstruktivno koronarno boleznijo ter brez koronarne bolezni so vrednosti TnI bistveno nižje in korelirajo z dolžino in intenziteto oživljanja. Sprejemni TnI je premalo zanesljiv za zanesljivo napovedovanje akutne trombotične lezije.

Language:Slovenian
Keywords:troponin I, nenadni srčni zastoj, koronarna bolezen, poškodba miokarda
Work type:Doctoral dissertation
Organization:MF - Faculty of Medicine
Year:2020
PID:20.500.12556/RUL-116012 This link opens in a new window
COBISS.SI-ID:19717123 This link opens in a new window
Publication date in RUL:07.05.2020
Views:2131
Downloads:256
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Secondary language

Language:English
Title:Troponin I and coronary anatomy in patients with sudden cardiac arrest
Abstract:
Aim: We investigated dynamics of high-sensitivity troponin I (cTnI) and associated extent of myocardial injury in out-of-hospital cardiac arrest (OHCA) patients with different extent of coronary artery disease. Methods: 159 consecutive patients undergoing immediate coronary angiography after OHCA were included and divided into groups with acute culprit lesion (A), stable obstructive coronary disease (B) and non-obstructive or absent coronary disease (C). Serial measurements of cTnI were obtained at admission and 3, 6, 12, 18, 24, 36 and 48 hours later. Area under cTnI curve was calculated and optimal cut-off value predicting acute coronary lesion was determined. Results: ST-elevation myocardial infarction (STEMI) was documented in 65 % in group A, 26 % in group B, and 11 % in group C (p < 0.001). cTnI, which was 0,88 ng/mL, 0,44 ng/mL and 0,19 ng/mL in groups A, B and C on admission (p < 0.001), increased to a maximum of 63,96 ng/mL, 10,00 ng/mL and 2,35 ng/mL, respectively (p < 0.001). Within the group A, cTnI was significantly larger in patients with acute occlusion than in patients with spontaneous reperfusion at initial angiography. Within groups B and C, peak cTnI correlated with duration of resuscitation, number of defibrillations and cumulative epinephrine dose. If admission cTnI exceeded 0,46 ng/mL, sensitivity for detection of acute culprit lesion was 64 % and specificity 60 %. Conclusions: Significant myocardial injury associated with highest cTnI levels in OHCA patients occurs in the presence of acute culprit lesion, particularly if the infarct-related coronary artery is still occluded at the time of coronary angiography. Extent of myocardial injury in stable or absent coronary disease is significantly smaller and correlates with the duration and intensity of cardiac resuscitation. Admission cTnI have insufficient accuracy to securely predict presence of acute culprit lesion.

Keywords:troponin I, out-of-hospital cardiac arrest, coronary artery disease, myocardial injury

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