Coronary flow reserve (original) (raw)
احتياطي التدفق التاجي (CFR) (Coronary flow reserve) هو أقصى زيادة في تدفق الدم خلال الشرايين التاجية بالمقارنة مع معدل تدفقه العادي أثناء الراحة. وغالبًا ما يساعد قياسه في علاج الحالات التي تؤثر على الشرايين التاجية كما يساهم في تحديد فعالية استخدام العلاجات.
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| dbo:abstract | احتياطي التدفق التاجي (CFR) (Coronary flow reserve) هو أقصى زيادة في تدفق الدم خلال الشرايين التاجية بالمقارنة مع معدل تدفقه العادي أثناء الراحة. وغالبًا ما يساعد قياسه في علاج الحالات التي تؤثر على الشرايين التاجية كما يساهم في تحديد فعالية استخدام العلاجات. (ar) Coronary flow reserve (CFR) is the maximum increase in blood flow through the coronary arteries above the normal resting volume. Its measurement is often used in medicine to assist in the treatment of conditions affecting the coronary arteries and to determine the efficacy of treatments used. (en) Per riserva coronarica si vuole intendere la differenza tra la perfusione coronarica a riposo e la perfusione coronarica massimale. Le coronarie possono essere vascolarizzate principalmente durante la diastole, cioè la fase di rilassamento del ciclo cardiaco (finestra diastolica), mentre durante la sistole vi circola poco sangue. Si deve poi distinguere tra coronaria destra (irrorata abbondantemente anche in sistole), e coronaria sinistra (nella quale passa pochissimo sangue in sistole e l'irrorazione è prevalentemente diastolica), questo per il diverso spessore della parete ventricolare miocardica, sulla cui superficie decorrono le coronarie (ventricolo sinistro circa 3 volte ventricolo destro).Questo comporta la necessità di un buon equilibrio tra frazione d'eiezione, cioè sangue espulso dal ventricolo e frequenza cardiaca. Oltre al fattore tempo, è fondamentale anche lo spessore del tessuto da irrorare: in caso di pareti cardiache spesse l'apporto di ossigeno negli strati più profondi sarà più difficile, poiché ivi la pressione esercitata dai fasci muscolari è più elevata.Ecco perché un infarto colpisce inizialmente a livello sottoendocardico. (it) |
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| dbo:wikiPageWikiLink | dbr:Coronary_artery dbr:Vasodilator dbr:Cardiac_syndrome_X dbr:Coronary_catheterization dbr:Anderson-Fabry_disease dbr:Coronary_arteries dbr:Coronary_artery_disease dbr:Coronary_circulation dbr:Stenosis dbr:Vasodilation dbr:Arterioles dbc:Cardiology dbr:Vascular_resistance dbr:Doppler_echocardiography dbr:Positron_emission_tomography dbr:Lumen_(anatomy) dbr:Myocardium dbr:Cineangiography |
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| rdfs:comment | احتياطي التدفق التاجي (CFR) (Coronary flow reserve) هو أقصى زيادة في تدفق الدم خلال الشرايين التاجية بالمقارنة مع معدل تدفقه العادي أثناء الراحة. وغالبًا ما يساعد قياسه في علاج الحالات التي تؤثر على الشرايين التاجية كما يساهم في تحديد فعالية استخدام العلاجات. (ar) Coronary flow reserve (CFR) is the maximum increase in blood flow through the coronary arteries above the normal resting volume. Its measurement is often used in medicine to assist in the treatment of conditions affecting the coronary arteries and to determine the efficacy of treatments used. (en) Per riserva coronarica si vuole intendere la differenza tra la perfusione coronarica a riposo e la perfusione coronarica massimale. Le coronarie possono essere vascolarizzate principalmente durante la diastole, cioè la fase di rilassamento del ciclo cardiaco (finestra diastolica), mentre durante la sistole vi circola poco sangue. Si deve poi distinguere tra coronaria destra (irrorata abbondantemente anche in sistole), e coronaria sinistra (nella quale passa pochissimo sangue in sistole e l'irrorazione è prevalentemente diastolica), questo per il diverso spessore della parete ventricolare miocardica, sulla cui superficie decorrono le coronarie (ventricolo sinistro circa 3 volte ventricolo destro).Questo comporta la necessità di un buon equilibrio tra frazione d'eiezione, cioè sangue espulso (it) |
| rdfs:label | احتياطي التدفق التاجي (ar) Coronary flow reserve (en) Riserva coronarica (it) |
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