Abstract：
:In the past, it has been assumed that some basic physiologic responses to altitude, exposure in coronary patients are comparable to those in normal young subjects. In fact there are similar changes in sympathetic activation, heart rate, and blood pressure early after ascent, with decrements in plasma volume, cardiac output, and stroke volume as acclimatization proceeds. These responses are described, and experience with coronary patients is reviewed. During the 1st 2 to 3 days at altitude, coronary patients are at greatest risk of untoward events. Gradual rather than abrupt ascent, a moderate degree of physical conditioning, early limitation of activity to a level tolerated at low altitude for somewhat less), and attention to blood pressure control all appear to have protective effects. Ascent to moderate altitude appears to entail little risk in coronary patients who are asymptomatic or have moderate exercise tolerance, provided that the above precautions are observed and that activity does not exceed levels at lower altitude. If activity is to be increased, pre-ascent treadmill exercise testing or Holter monitor data secured under conditions comparable to those anticipated at altitude may provide reasonable guidelines. For coronary patients previously evaluated and known to be in a high-risk category, indications for ascent should be examined more critically, and precautionary measures should be more rigorous. Advice for patients with known coronary disease who may desire to trek at very high altitude must involve individual evaluation, and guidelines remain elusive.
journal_name
Tex Heart Inst Jjournal_title
Texas Heart Institute journalauthors
Alexander JKsubject
Has Abstractpub_date
1994-01-01 00:00:00pages
261-6issue
4eissn
0730-2347issn
1526-6702journal_volume
21pub_type
杂志文章,评审abstract：:In patients who have cyanosis and dyspnea that are unrelated to a cardiopulmonary cause, 1 rare possible diagnosis is methemoglobinemia. This condition is generally asymptomatic, even when the methemoglobin level is as high as 40% of the total hemoglobin value. In the patient described herein, extensive pulmonologic a...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：2008-01-01 00:00:00
abstract：:A 49-year-old patient, referred with a diagnosis of right atrial myxoma, was found at surgery to have extensive cardiac metastases from a previously undetected cutaneous melanoma. In reviewing the literature, we found 5 other patients with a clinical diagnosis of melanoma metastatic to the heart, all of whom had a pre...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：1990-01-01 00:00:00
abstract：:We describe the case of a 35-year-old man with severe, dilated idiopathic cardiomyopathy who was placed on the waiting list for cardiac transplantation. While awaiting transplantation, his heart failure decompensated to such a degree that left ventricular assist device support was necessary. He did well on device supp...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：2012-01-01 00:00:00
abstract：:A 58-year-old man presented with chest pain and tightness and was diagnosed with a Q-wave anterior myocardial infarction. He then developed pulseless ventricular arrhythmias, which were treated with repeated direct-current shocks and intravenous amiodarone. He underwent emergency cardiac catheterization: stents were d...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：2011-01-01 00:00:00
abstract：:Paleopathology, the study of disease in ancient remains, adds the dimension of time to our study of health and disease. The oldest preserved heart is from a mummified rabbit of the Pleistocene epoch, over 20,000 years old. Cardiovascular disease has been identified in human mummies from Alaska and Egypt, covering a ti...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：1993-01-01 00:00:00
abstract：:We describe a technique of intravalvular implantation of a low-profile prosthesis that has been used in nine patients with mitral valve lesions. This technique preserves the anterior and posterior chordae and papillary mechanisms, which may decrease the incidence of postoperative left ventricular dysfunction that has ...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：1987-06-01 00:00:00
abstract：:Willem Einthoven (1860--1927), known as the creator of the electrocardiograph, won a Nobel Prize in 1924 for his contributions to the field of electrocardiography. He was dedicated to research and learning. In developing the electrocardiograph, Einthoven built on the work of earlier physiologists who had studied the e...
journal_title：Texas Heart Institute journal
pub_type： 传,历史文章,杂志文章
doi：
更新日期：2008-01-01 00:00:00
abstract：:In the following review, we outline the cellular ontogeny and time course of coronary artery development within the vertebrate heart. Our eventual focus will be the potential role of arteriogenesis in the differentiation of a subset of specialized conduction cells in the chick heart. We begin by briefly outlining earl...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章,评审
doi：
更新日期：2002-01-01 00:00:00
abstract：:Carcinoid tumors are rare neuroendocrine malignancies that typically originate from the gastrointestinal tract. Patients who are diagnosed with carcinoid heart disease generally have poor prognoses because of advanced metastases during staging and few therapeutic options. We present the case of a 61-year-old woman wit...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：10.14503/THIJ-13-3314
更新日期：2014-10-01 00:00:00
abstract：:During his work, an 18-year-old carpenter-in-training overbalanced and shot himself in the left median thorax with a nail gun. The patient was delivered to our thoracic surgery unit with a tentative diagnosis of penetrating lung trauma. An emergent computed tomogram showed a heart-penetrating nail injury. The patient ...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：10.14503/THIJ-13-3405
更新日期：2014-08-01 00:00:00
abstract：:To investigate whether transcatheter device closure of patent ductus arteriosus (PDA) is safe in children with pulmonary artery hypertension, we retrospectively analyzed our experience with 33 patients who underwent the procedure from January 2000 through August 2015. Pulmonary artery hypertension was defined as a pul...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：10.14503/THIJ-19-6982
更新日期：2020-08-01 00:00:00
abstract：:We describe the case of a young woman with Takayasu's arteritis that initially manifested as heart failure due to left main coronary artery stenosis. The patient's occluded subclavian artery and the active inflammatory process of Takayasu's arteritis precluded coronary artery bypass grafting with the use of arterial g...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：2006-01-01 00:00:00
abstract：:Suprarenal or supraceliac aortic clamping during repair of infrarenal abdominal aortic aneurysms can be complicated by renal, hepatic, and intestinal ischemia. To determine whether suprarenal or supraceliac clamping increases morbidity and mortality we retrospectively reviewed our recent nonrandomized experience. Betw...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：2001-01-01 00:00:00
abstract：:Ischemic mitral regurgitation, a complication of myocardial infarction, is associated with a poor prognosis and can result in postinfarction congestive heart failure. The preferred treatment of its chronic form is a matter of debate. Herein, we report the early and midterm results in 44 patients with chronic ischemic ...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：2009-01-01 00:00:00
abstract：:We discuss the case of a 38-year-old black man who presented at our hospital with his first episode of syncope, recently developed atrial arrhythmias refractory to pharmacologic therapy, and a left atrial thrombus. He was diagnosed with primary cardiac sarcoidosis characterized by predominant involvement of the epicar...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章,评审
doi：10.14503/THIJ-14-4792
更新日期：2016-06-01 00:00:00
abstract：:Minimally invasive cardiac surgery is rapidly gaining interest because of fast recovery, reduced morbidity, shorter hospital stay, lower costs, and better cosmetic results. Aortic valve surgery can be performed through a small (10- to 12-cm) transverse sternal incision, and femoro-femoral cannulation is used for cardi...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：1997-01-01 00:00:00
abstract：:The inflammatory response induced by cardiopulmonary bypass decreases vascular tone, which in turn can lead to vasoplegic syndrome. Indeed the hypotension consequent to on-pump cardiac surgery often necessitates vasopressor and intravenous fluid support. Methylene blue counteracts vasoplegic syndrome by inhibiting the...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：10.14503/THIJ-14-4470
更新日期：2015-10-01 00:00:00
abstract：:Transmyocardial laser revascularization, a new surgical technique, is being tested in patients with chronic obstructive coronary artery disease that is refractory to conventional revascularization techniques and to maximal medical therapy. During the operation, which is performed on the beating heart through a left th...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：1994-01-01 00:00:00
abstract：:Between May 1976 and December 1982 (104 months), 152 patients from a total of 3592 patients who had coronary angiography at the Buffalo Veterans Administration Medical Center had coronary artery disease with left ventricular ejection fractions of 40% or below. Sixty-three patients in this group had coronary bypass sur...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：1986-03-01 00:00:00
abstract：:As the indications for implanting left ventricular assist devices have expanded, some patients are qualifying for device removal after myocardial recovery. Whereas explantation has been described for previous generations of devices, no standard procedures have been developed. Removal of centrifugal-flow devices has cr...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：10.14503/THIJ-19-7097
更新日期：2020-08-01 00:00:00
abstract：:We report a case of an 11-year-old girl who presented with a slowly enlarging mass in the right posterolateral chest wall. Computed tomography showed a soft-tissue mass 8.5 × 7.5 × 5.5 cm in size, arising from the right posterolateral 9th, 10th, and 11th intercostal spaces. Magnetic resonance imaging confirmed a vascu...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：2010-01-01 00:00:00
abstract：:Matrix metalloproteinases (MMPs) and tissue inhibitors of matrix metalloproteinases (TIMPs) are thought to be associated with coronary artery disease. The association of these markers with incident coronary artery disease has not been well described. Using a case-cohort design, we selected 216 individuals who had inci...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：2008-01-01 00:00:00
abstract：:Herein, we describe the case of a 50-year-old man who had a fistula, located between the left anterior descending coronary artery and the left ventricle, that caused myocardial infarction. Electrocardiography revealed a loss of R-wave progression in leads V(1) through V(4), and transthoracic echocardiography showed an...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：2009-01-01 00:00:00
abstract：:The relationship between brain natriuretic peptide and cardiopulmonary bypass has not been examined sufficiently. In this study, we prospectively examined brain natriuretic peptide levels in the plasma of 26 patients undergoing coronary artery bypass grafting. Brain natriuretic peptide measurements were carried out at...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：2003-01-01 00:00:00
abstract：:Amiodarone therapy for the treatment of arrhythmias has been found to have severe side effects. Although the drug has been prescribed in Europe for more than 20 years, it has only recently been used in the United States as an investigational drug, and has been found to cause pulmonary toxicity, as well as other major ...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：1984-06-01 00:00:00
abstract：:In this case report, we describe direct percutaneous delivery of a muscular-ventricular-septal-defect occluder device to close a left ventricular pseudoaneurysm. The occluder was positioned and deployed with the aid of concurrent transthoracic ultrasonography, transesophageal echocardiography, and fluoroscopy. In cont...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：10.14503/THIJ-14-4243
更新日期：2015-08-01 00:00:00
abstract：:The indications for transcatheter aortic valve implantation have been increasing with the development of new-generation valves and delivery systems. Our patient, an 81-year-old man with aortic stenosis, had an existing coronary artery bypass graft and bilateral aortoiliac bypass grafts. We used the transfemoral approa...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：2012-01-01 00:00:00
abstract：:The objective of this study was to determine the safety and feasibility of performing transendocardial electromechanical mapping and mesenchymal precursor stem cell injections after left ventricular assist device (LVAD) implantation in a sheep model of acute myocardial infarction. Six sheep were assigned to either an ...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：2013-01-01 00:00:00
abstract：:We report the case of a 52-year-old man who had incessant ventricular tachycardia despite treatment with antiarrhythmic agents. Placement of an implantable cardioverter/defibrillator, radiofrequency ablation, and antitachycardia pacing were ineffective. He underwent intraoperative arrhythmia mapping and cryoablation a...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：2000-01-01 00:00:00
abstract：:We describe the case of a patient with osteogenesis imperfecta tarda (Lobstein's syndrome) and mitral valve insufficiency. The course after mitral valve replacement was complicated by rupture of the left ventricular posterior wall, which caused massive bleeding and sudden death. The pathologic findings and the operati...
journal_title：Texas Heart Institute journal
pub_type： 杂志文章
doi：
更新日期：1999-01-01 00:00:00
