Texas Heart Institute journal
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Case Reports
High-pressure pulmonary artery aneurysm and unilateral pulmonary artery agenesis in an adult.
The presence of a pulmonary artery aneurysm, major aortopulmonary and coronary-pulmonary collateral vessels, and severe pulmonary hypertension in an adult with unilateral pulmonary artery agenesis and previous patent ductus arteriosus ligation is very rare. A 34-year-old man experienced these conditions. When he was 10 years old, catheterization and angiography revealed right pulmonary artery agenesis, dilation of the main pulmonary artery, multiple collateral vessels extending from the aorta to the right pulmonary system, and a patent ductus arteriosus (shunt ratio, 3.57) that was then ligated; the other conditions were not corrected. ⋯ We concluded that irreversible pulmonary hypertension had developed (delayed by the patent ductus arteriosus ligation in childhood) and that the patient's only chance for survival was heart-lung transplantation. To sustain the patient until surgery, we administered sildenafil. Herein, we describe the vascular conditions that accompany unilateral absence of the pulmonary artery, and therapeutic methods.
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Cardiogenic shock after acute myocardial infarction is associated with a high mortality rate despite modern reperfusion methods and intra-aortic balloon pump support. For myocardial infarction patients in cardiogenic shock that is refractory to intra-aortic ballon pump counterpulsation and pressors (severe refractory cardiogenic shock), there are limited means to rapidly provide additional hemodynamic support. We present the case of a 49-year-old man who presented with an anterior wall acute myocardial infarction complicated by cardiogenic shock. ⋯ Cardiopulmonary resuscitation was started, and the patient underwent urgent placement of a TandemHeart percutaneous ventricular assist device. The device enabled the reversal of terminal hemodynamic collapse during active cardiopulmonary resuscitation, subsequent stabilization of the patient, and discharge of the patient from the hospital after device removal. In this patient, the percutaneous ventricular assist device was successful in the treatment of severe refractory cardiogenic shock after acute myocardial infarction.
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Biography Historical Article
A history of streptokinase use in acute myocardial infarction.
A serendipitous discovery by William Smith Tillett in 1933, followed by many years of work with his student Sol Sherry, laid a sound foundation for the use of streptokinase as a thrombolytic agent in the treatment of acute myocardial infarction. The drug found initial clinical application in combating fibrinous pleural exudates, hemothorax, and tuberculous meningitis. In 1958, Sherry and others started using streptokinase in patients with acute myocardial infarction and changed the focus of treatment from palliation to "cure." Initial trials that used streptokinase infusion produced conflicting results. ⋯ Subsequently, larger trials of intracoronary infusion achieved reperfusion rates ranging from 70% to 90%. The need for a meticulously planned and systematically executed randomized multicenter trial was fulfilled by the Gruppo Italiano per la Sperimentazione della Streptochinasi nell'Infarto Miocardico (GISSI) trial in 1986, which not only validated streptokinase as an effective therapeutic method but also established a fixed protocol for its use in acute myocardial infarction. Currently, despite the wide use of tissue plasminogen activator in developed nations, streptokinase remains essential to the management of acute myocardial infarction in developing nations.
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Case Reports
Mesenteric oxygen desaturation in an infant with congenital heart disease and necrotizing enterocolitis.
Congenital heart disease is a risk factor for the development of necrotizing enterocolitis, although the exact mechanism of development remains unclear. Herein, we report the case of an infant with pulmonary atresia, an intact ventricular septum, and multiple aortopulmonary collateral vessels. ⋯ This case highlights the importance of impaired mesenteric oxygen delivery consequential to congenital heart disease as a possible risk factor for necrotizing enterocolitis, and the use of near-infrared spectroscopy to measure tissue perfusion noninvasively in high-risk patients. To our knowledge, this is the 1st report of mesenteric oxyhemoglobin desaturation in association with necrotizing enterocolitis in a patient who also had congenital heart disease.
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Herein, we describe the design of a perfusion system for a complex cardiovascular reoperation in an 11-kg Jehovah's Witness patient. The goal of safe, transfusion-free surgery was achieved chiefly by minimizing the priming volume of the cardiopulmonary bypass circuit to 200 mL while providing adequate flow and standard safety features.