#121
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#122
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Óâàæàåìûé Êîíñòàíòèí, Âû, íàâåðíîå , ñìååòåñü. ![]() Íå èìååò ñìûñëà îïðåäåëÿòü æèçíåñïîñîáíûé ìèîêàðä êàê ðàç òåì, ãäå íîðìàëüíàÿ Ô ËÆ. ßñíî, ÷òî ìèîêàðäà òàì äîñòàòî÷íî, èíà÷å íåêîìó áûëî áû ñîçäàâàòü ýòó ñàìóþ íîðìàëüíóþ ÔÂ. Òàì æå, ãäå Ô ËÆ ñíèæåíà, ñóùåñòâóåò âîçìîæíîñòü íåõâàòêè æèçíåñïîñîáíîãî ìèîêàðäà. Òîãî ñàìîãî, êîòîðûé íå ôóíêöèîíèðóåò, íàõîäÿñü, ñêàæåì, â èøåìèè. Ïîñêîëüêó îí íå ôóíêöèîíèðóåò, Ô ËÆ ñíèæåíà. Åñëè åãî íå ðåâàñêóëÿðèçèðîâàòü, à âåñòè òåðàïåâòè÷åñêè, òî higher annual mortality in patients with viable myocardium who were treated medically. Åñëè æå âìåñòî íåãî ðóáåö - ñ ðóáöîì íè÷åãî íå áóäåò, êàê åãî íè ðåâàñêóëÿðèçèðóé. Òî åñòü èìåííî ó áîëüíûõ ñî ñíèæåííîé Ô è íàäî îïðåäåëÿòü æèçíåñïîñîáíîñòü ìèîêàðäà äëÿ âûáîðà àäåêâàòíîé òàêòèêè ëå÷åíèÿ. Âñå-òàêè, äóìàþ, Âû ñìååòåñü... ![]() PS ×óòü-÷óòü ïî ïîâîäó ñàìîé Ô ËÆ. Íå ãîâîðÿ î ìåòîäàõ, à ëèøü î åå âåëè÷èíàõ â ëèòåðàòóðå, ïîðîãîâàÿ âåëè÷èíà äëÿ ïðèíÿòèÿ ðåøåíèÿ êîëåáëåòñÿ â ðàçíûõ èñòî÷íèêàõ îò 45% äî 35%.  ýòîé ðàáîòå àâòîðû ïðèâåëè 40%. Ýòî ïèåìëåìûå êîëåáàíèÿ. |
#123
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David M. Larson, MD; Katie M. Menssen, BA; Scott W. Sharkey, MD; Sue Duval, PhD; Robert S. Schwartz, MD; James Harris, MD; Jeffrey T. Meland, MD; Barbara T. Unger, RN; Timothy D. Henry, MD JAMA. 2007;298(23):2754-2760. Context Allowing the emergency department physician to activate the cardiac catheterization laboratory is a key strategy to reduce door-to-balloon times in patients with ST-segment elevation myocardial infarction (STEMI). There are limited data on the frequency of "false-positive" catheterization laboratory activation in patients undergoing percutaneous coronary intervention for suspected STEMI. Objective To determine the prevalence, etiology, and outcomes of false-positive cardiac catheterization laboratory activation in patients with a suspected STEMI. Design, Setting, and Patients Prospective registry from a regional system that includes transfer of patients with STEMI from 30 community and rural hospitals with pretransfer catheterization laboratory activation for percutaneous coronary intervention at a tertiary cardiovascular center in Minnesota. A total of 1345 patients were enrolled from March 2003 to November 2006. Main Outcome Measure Prevalence of false-positive catheterization laboratory activation in patients with suspected STEMI by 3 criteria: no culprit coronary artery, no significant coronary artery disease, and negative cardiac biomarker results. Results Of the 1335 patients with suspected STEMI who underwent angiography, 187 (14%; 95% confidence interval [CI], 12.2%-16.0%) had no culprit coronary artery and 127 (9.5%; 95% CI, 8.0%-11.2%) did not have significant coronary artery disease. Cardiac biomarker levels were negative in 11.2% (95% CI, 9.6%-13.0%) of patients. The combination of no culprit artery with negative cardiac biomarker results was present in 9.2% (95% CI, 7.7%-10.9%) of patients. Thirty-day mortality was 2.7% (95% CI, 0.4%-5.0%) without vs 4.6% (95% CI, 3.4%-5.8%) with a culprit coronary artery (P = .33). Conclusions The frequency of false-positive cardiac catheterization laboratory activation for suspected STEMI is relatively common in community practice, depending on the definition of false-positive. Recent emphasis on rapid door-to-balloon times must also consider the consequences of false-positive catheterization laboratory activation. Åùå ðàç õî÷ó ïîâòîðèòü - ðàäèîíóêëèäíûì èçîáðàæåíèÿì ïåðôóçèè, èñïîëüçóþùèì àãåíòû íåïîñðåäñòâåííî ó÷àñòâóþùèå â îáìåíå âåùåñòâ â êëåòêå, àáñîëþòíî âñå ðàâíî, íà êàêîì óðîâíå âîçíèêëè íàðóøåíèÿ êðîâîñíàáæåíèÿ. Ýòè àãåíòû ïîêàæóò ëèøü òîò ìèîêàðä, îáìåí âåùåñòâ â êîòîðîì (à çíà÷èò è öåëîñòíîñòü ìåìáðàíû êëåòêè) ñîõðàíåíû. Åñëè íàðóøåíèÿ êðîâîñíàáæåíèÿ åñòü - ïîêàæóò èõ ëîêàëèçàöèþ è ñòåïåíü ýòèõ íàðóøåíèé. È âñå ýòî ìîæíî îöåíèòü óæå â ïîêîå íà 15 ìèíóò. Íèêàêèõ íàãðóçîê è ôóíêöèîíàëüíûõ ïðîá íå íàäî. ![]() |
#124
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#125
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âèäèìî, ÷òîáû âûÿâèòü èøåìèçèðîâàííûé ñåãìåíò ìèîêàðäà, êîòîðûé â ïîêîå íîðìàëüíî ñîêðàùàåòñÿ, ïðè íàãðóçêå æå "âûäàåò" ãèïîêèíåç(ïðè ñòðåññ ÝÕÎ), èëè æå ñíèæåíèå ïåðôóçèè ïî äàííûì ðàäèîèçîòîïíûõ ìåòîäîâ. ÿ òàê ýòîò âîïðîñ ïîíèìàþ. Ñìûñë ñòðåññ òåñòà äëÿ âûÿâëåíèÿ æèçíåñïîñîáíîãî( âèäèìî ãèáåðíèðóþùåãî) ìèîêàðäà â çîíå ïðåäïîëàãàåìîãî ðóáöà ïîñëå ÎÈÌ ñ ýëåâ ST, ÿ âîîáùå íå ïîíèìàþ. Òàì æå è òàê íè÷åãî íå ñîêðàùàåòñÿ)) ÷òî îíî ïîñëå ïîâûøåíèÿ íàãðóçêè ñîêðàùàòüñÿ íà÷íåò ÷òîëè??? ![]() Ñöèíòè - îòëè÷íàÿ ìåòîäèêà. Æàëü, â ìîåì ó÷ðåæäåíèè åãî èãíîðèðóþò. Íà ìîåé ïàìÿòè êàðäèîëîãè âñåãî îäèí ðàç îòïðàâèëè ïàöèåíòà íà ñöèíòè, è òî, ÷òîáû äîêàçàòü ÷òî íàøà ïðîöåäóðà îñëîæíèëàñü ïåðèïðîöåäóðàëüíûì èíôàðêòîì â ðåçóëüòàòå îêêëþçèðóþùåé äèññêåöèè. Òàê îíî è òàê áûëî ïîíÿòíî ïî ïîâûøåíèþ òðîïîíèíîâ, ýëåâàöèè ÑÒ, è êðîâîòîêó TIMI 1 â èíôàðêò - îòâåòñòâåííîì ñîñóäå è êîíå÷íî ïî êëèíèêå èíôàðêòà ó ïàöèåíòà(áîëè). È ëèøü âðàæäåáíîå îòíîøåíèè çàñòàâèëî èõ "äîáèòü" íàñ åùå è ðàäèîèçîòîïíûì èññëåäîâàíèåì ![]() |
#126
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Ó Åâãåíèÿ Íèêîëàåâè÷à, íàñêîëüêî ÿ ìåëüêîì ñëûøàë, åñòü ìåòîäèêà ñöèíòèãðàôèè ñ íèòðàòàìè, áåç âñÿêîé íàãðóçêè. Ïðàâäà êîíêðåòíî ñ ïðîòîêîëîì ýòîãî èññëåäîâàíèÿ ÿ íå çíàêîì(ê ñîæàëåíèþ)).
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#127
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[Ññûëêè äîñòóïíû òîëüêî çàðåãèñòðèðîâàííûì ïîëüçîâàòåëÿì ] [Ññûëêè äîñòóïíû òîëüêî çàðåãèñòðèðîâàííûì ïîëüçîâàòåëÿì ] [Ññûëêè äîñòóïíû òîëüêî çàðåãèñòðèðîâàííûì ïîëüçîâàòåëÿì ] [Ññûëêè äîñòóïíû òîëüêî çàðåãèñòðèðîâàííûì ïîëüçîâàòåëÿì ] [Ññûëêè äîñòóïíû òîëüêî çàðåãèñòðèðîâàííûì ïîëüçîâàòåëÿì ] [Ññûëêè äîñòóïíû òîëüêî çàðåãèñòðèðîâàííûì ïîëüçîâàòåëÿì ] [Ññûëêè äîñòóïíû òîëüêî çàðåãèñòðèðîâàííûì ïîëüçîâàòåëÿì ] [Ññûëêè äîñòóïíû òîëüêî çàðåãèñòðèðîâàííûì ïîëüçîâàòåëÿì ] Nitrate-enhanced gated SPECT in patients with primary angioplasty for acute myocardial infarction: evidence of a reversible and nitrate-sensitive impairment of myocardial perfusion Eur J Nucl Med Mol Imaging (2007) 34:1981–1990... Conclusion The improvement in perfusion which is documented in the months following MI reperfusion is predicted by initial nitrate enhancement of sestamibi uptake, suggesting a mechanism of reversible vascular injury. In his particular setting, sestamibi uptake is a better predictor of contractility recovery when determined after nitrate administration rather than under conventional resting conditions. [Ññûëêè äîñòóïíû òîëüêî çàðåãèñòðèðîâàííûì ïîëüçîâàòåëÿì ] Ñïèñîê ýòîò ìîæíî ïðîäîëæàòü åùå äîëãî, òåì áîëåå, ÷òî âñå ýòî äàêàçàíî "òàì" áîëåå 10 ëåò íàçàä. Åñëè íóæäàåòåñü â ñîãëàñîâàííûõ ìåòîäè÷åñêèõ óêàçàíèÿõ ïðîøó : [Ññûëêè äîñòóïíû òîëüêî çàðåãèñòðèðîâàííûì ïîëüçîâàòåëÿì ] |
#128
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Âîò äëÿ òîãî, ÷òîáû è Âû, â òîì ÷èñëå, äîáèâàëèñü èçîòîïíûõ èññëåäîâàíèé, ÿ çäåñü è "ïàðþñü" ñ âàìè, õîòÿ ëè÷íî ìíå ýòî íèêàêîé ïîëüçû, êðîìå íåðâîòðåïêè, íå äàåò... Èçâèíèòå
![]() [Ññûëêè äîñòóïíû òîëüêî çàðåãèñòðèðîâàííûì ïîëüçîâàòåëÿì ] Myocardial Perfusion Imaging for Evaluation and Triage of Patients With Suspected Acute Cardiac Ischemia A Randomized Controlled Trial James E. Udelson, MD; Joni R. Beshansky, RN, MPH; Daniel S. Ballin, MD; James A. Feldman, MD; John L. Griffith, PhD; Gary V. Heller, MD, PhD; Robert C. Hendel, MD; J. Hector Pope, MD; Robin Ruthazer, MPH; Ethan J. Spiegler, MD; Robert H. Woolard, MD; Jonathan Handler, MD; Harry P. Selker, MD, MSPH JAMA. 2002;288:2693-2700 Objective To assess whether incorporating acute resting perfusion imaging into an ED evaluation strategy for patients with suspected acute ischemia but no initial electrocardiogram (ECG) changes diagnostic of acute ischemia improves clinical decision making for initial ED triage. Design, Setting, and Patients Prospective, randomized controlled trial conducted at 7 academic medical centers and community hospitals between July 1997 and May 1999 among 2475 adult ED patients with chest pain or other symptoms suggestive of acute cardiac ischemia and with normal or nondiagnostic initial ECG results. Intervention Patients were randomly assigned to receive either the usual ED evaluation strategy (n = 1260) or the usual strategy supplemented with results from acute resting myocardial perfusion imaging using single-photon emission computed tomography with injection of 20 to 30 mCi of Tc-99m sestamibi (n = 1215), interpreted in real time by local staff physicians and with results provided to the ED physician for incorporation into clinical decision making. Main Outcome Measure Appropriateness of triage decision either to admit to hospital/observation or to discharge directly home from the ED. Results Among patients with acute cardiac ischemia (ie, acute myocardial infarction [MI] or unstable angina; n = 329), there were no differences in ED triage decisions between those receiving standard evaluation and those whose evaluation was supplemented by a sestamibi scan. Among patients with acute MI (n = 56), 97% vs 96% were hospitalized (relative risk [RR], 1.00; 95% confidence interval [CI], 0.89-1.12), and among those with unstable angina (n = 273), 83% vs 81% were hospitalized (RR, 0.98; 95% CI, 0.87-1.10). However, among patients without acute cardiac ischemia (n = 2146), hospitalization was 52% with usual care vs 42% with sestamibi imaging (RR, 0.84; 95% CI, 0.77-0.92). Conclusions Sestamibi perfusion imaging improves ED triage decision making for patients with symptoms suggestive of acute cardiac ischemia without obvious abnormalities on initial ECG. In this study, unnecessary hospitalizations were reduced among patients without acute ischemia, without reducing appropriate admission for patients with acute ischemia. |
#129
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Öèòàòà:
ìåòîä çàêëþ÷àåòñÿ â òîì, ÷òî âìåñòî òðàäèöèîííîãî òåñòà ñ ôèçè÷åñêîé íàãðóçêîé ïåðåä ââåäåíèå ÐÔÏ äàåòñÿ íèòðîãëèöåðèí (èëè íèòðîñïðåé) ïîä ÿçûê! |
#130
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#131
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#132
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[Ññûëêè äîñòóïíû òîëüêî çàðåãèñòðèðîâàííûì ïîëüçîâàòåëÿì ] |
#133
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Óâàæàåìûå êîëëåãè! Ïðîøó Âàñ îñòàâàòüñÿ â àêàäåìè÷åñêèõ ðàìêàõ âåäåíèÿ äèñêóññèè.  ïðîòèâíîì ñëó÷àå ÿ áóäó âûíóæäåí çàêðûòü ñèþ æèâîòðåïåùóùóþ òåìó.
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#134
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Ïðîøó ïðîùåíèÿ, âêëèíþñü :)
Åâãåíèé Íèêîëàåâè÷, ïîñìîòðèòå, ïîæàëóéñòà, ýòó òåìó . Êàê Âû äóìàåòå, èìååò ëè çäåñü ñìûñë íàïðàâëÿòü ïàöèåíòà íà ðàäèîíóêëèäíîå èññëåäîâàíèå è åñëè äà, òî êàêîå?
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#135
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Íäà, òåïåðü ïîíèìàþ, ÷òî â èíñòèòóòå âìåñòî àíàòîìèè è ôèçèîëîãèè íóæíî áûëî ó÷èòü àíãëèéñêèé
![]() ß òàê ïîíÿë ÷òî íàãðóçêà íóæíà åñëè ïî äàííûì ðàäèîèçîòîïîíîãî ìåòîäà êàêîé òî ïðîöåíò "æèâîãî" ìèîêàðäà âñå òàêè åñòü. Åñëè æå òàì òåìíîå ïÿòíî, ÷òî íàãðóæàòü ? Åâãåíèé Íèêîëàåâè÷, áóäüòå ÷óòü áîëåå ñíèñõîäèòåëüíû. ß íà âòîðîì ãîäó îðäèíàòóðû ïî ðåíòãåíõèðóðãèè, öèêë ïî ðàäèîèçîïàì áûë âñåãî ìåñÿö, è òî, ó íàñ â îñíîâíîì èçó÷àþò ôóíêöèþ ïî÷åê è ïå÷åíè)). ÍÅ ÓÑÏÅË ß ÏÎÊÀ ÄÎÑÊÀÍÀËÜÍÎ ÈÇÓ×ÈÒÜ ÐÀÄÈÎÈÇÎÒÎÏÍÓÞ ÄÈÀÃÍÎÑÒÈÊÓ ![]() ![]() ![]() |