Placement of an arterial line.
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Catheterization, Peripheral↗
Biomedical subjects
Luis D Berrizbeitia
Publications and source records attributed to Luis D Berrizbeitia.
Ruptured right coronary artery aneurysm presenting as a myocardial mass.
Rupture of a coronary artery aneurysm may result in a contained hematoma and an intramyocardial mass. We present a case of a contained coronary artery aneurysm rupture presenting as a mass in the right ventricle. The mass was suspected in a preoperative transthoracic echocardiogram and identified at the time of elective coronary artery bypass surgery. We discuss the pathophysiology, clinical presentation, diagnostic features, and management of this uncommon clinical presentation.
Aneurysm, Ruptured↗
Oxygen modulation of superoxide radical injury in the krebs-perfused, isolated rabbit heart.
Myocardial malondialdehyde concentration (MDA) as an index of membrane lipoperoxidation was measured in previously ischemic isolated rabbit hearts reperfused with Krebs solution equilibrated with different oxygen concentrations. Hearts were subjected to a ischemic period of 30 min at 4 degrees C and then reperfused at 37 degrees C with a Krebs-Henseleit solution equilibrated with 95% oxygen (group 1), 65% oxygen (group 2), or 21% oxygen (group 3). MDA concentration in nanomoles per gram protein (mean +/- SEM) at the end of reperfusion in group 1 (n = 5) was 357 +/- 18; in group 2 (n = 5) 282 +/- 18; and in group 3 (n = 5) 246 +/- 16 (p =.0008, group 1 vs. group 3; p =.0109, group 1 vs. group 2). The results support that oxidative stress after ischemia and reperfusion is modulated by the oxygen concentration of the reperfusate in the crystalloid-perfused isolated rabbit heart such that higher oxygen concentrations are associated with greater oxidative stress.
Animals↗