Details

Autor(en) / Beteiligte

• Carvalho, Valéria B.
• Macruz, Radi
• Décourt, Luiz V.
• Arie, Siguemituzo
• Manrique, Ricardo
• Mello, Sérgio C.
• Godoy, Milton
• Galiano, Norberto
• da Luz, Protásio L.
• Pileggi, Fúlvio

Titel

Hemodynamic determinants of coronary constriction in human myocardial bridges

Ist Teil von

• The American heart journal, 1984-07, Vol.108 (1), p.73-80

Ort / Verlag

New York, NY: Mosby, Inc

Erscheinungsjahr

1984

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• To study the physiopathology of myocardial bridges, we assessed the degree of systolic coronary artery constriction (%SC) in different hemodynamic situations in six patients submitted for coronary angiograms. There was an increase of %SC ( p < 0.05) with sodium nitroprusside (NP), no modification during fast atrial stimulation (AS), and a decrease ( p < 0.05) during noradrenaline infusion (Nor). Hemodynamic studies indicate an inverse relation ( p < 0.05) between %SC and systolic and diastolic aortic pressure and left ventricular dP/dt. There was no correlation between changes in %SC and changes in V max or heart rate. Thus we conclude that changes in systemic arterial pressure and coronary perfusion pressure may significantly affect the degree of severity of myocardial bridges, possibly through an influence upon intraluminal coronary pressure and an intramyocardial tension relationship.