نتایج جستجو برای: valsalva ratio
تعداد نتایج: 505412 فیلتر نتایج به سال:
Introduction: The occurrence of autonomic dysfunction in human immunodeficiency virus (HIV) patients impacts their health care in several ways. Extra precaution is needed during invasive surgical procedures are to be done. Whether dys-autonomia is related to severity of HIV disease is still a matter of controversy. Materials and Methods: This was a prospective, hospital-based study. 50 patients...
Obstructive sleep apnea (OSA) is accompanied by structural alterations and dysfunction in central autonomic regulatory regions, which may impair dynamic and static cardiovascular regulation, and contribute to other syndrome pathologies. Characterizing cardiovascular responses to autonomic challenges may provide insights into central nervous system impairments, including contributions by sex, si...
PURPOSE To evaluate the heart rate variability (HRV) indices and heart rate (HR) responses during isometric contraction (IC) and Valsalva maneuver (VM) in COPD patients. METHODS Twenty-two stable moderate to severe COPD patients were evaluated. R-R intervals were recorded (monitor Polar® S810i) during dominant upper limb IC (2 minutes). Stable signals were analyzed by Kubios HRV® software. In...
Introduction: Spontaneous pneumomediastinum (SP) is the accumulation of air in mediastinum without a surgical or traumatic etiology. It thought that basic mechanism triggering SP pressure difference develops after strong Valsalva maneuver.
 Case report: We presented 50-year-old male patient was admitted to emergency department with sudden onset chest and epigastric pain started standing up...
Introduction: Valsalva retinopathy is a unilateral or bilateral condition that occurs when increased intra-thoracic or intra-abdominal pressure transmitted to the eye causes a sharp rise in the intraocular venous pressure, and rupture of superficial retinal capillaries. The patient often gives a history of a recent strenuous physical act, which could have increased the intra-thoracic pressure. ...
The association of sinuses of Valsalva dilatation and aortic regurgitation with hypertension is disputed, and few data are available in population-based samples. We explored the relations of sinuses of Valsalva dilatation and aortic regurgitation to hypertension and additional clinical and echocardiographic data in 2096 hypertensive and 361 normotensive participants in the Hypertension Genetic ...
A case is reported in which a congenital aneurysm of the right coronary sinus of Valsalva ruptured and dissected into the interventricular septum. M-mode and cross-sectional echocardiographic examination allowed accurate preoperative assessment of the pathologic anatomy, which was confirmed by angiography, surgery and autopsy. Dissection of the interventricular septum by a congenital sinus of V...
A patient who had endocarditis on a prosthetic aortic valve and who had undergone two aortic valvular replacements developed classic angina pectoris. Cardiac catheterization revealed an aneurysm of the left sinus of Valsalva, which constricted a proximal segment of the left circumflex coronary artery during systole. This type of dynamic coronary arterial narrowing has not been previously descri...
Aneurysm of the left sinus of Valsalva is rare, and there is only one previous report of rupture into the pulmonary artery. This report describes a patient with valvular pulmonary atresia and ventricular septal defect in whom a portion of his pulmonary blood flow was supplied by an aortopulmonary tunnel arising from a left sinus of Valsalva aneurysm. The surgical implications of precise definit...
This is a case report of spontaneous pneumomediastinum that occurred in a 19-year-old army trainee during his 2.4km run. Spontaneous pneumomediastinum is a rare disorder. It is usually precipitated by activities related to Valsalva manoeuvres such as strenuous physical activities, retching and vomiting. Treatment is expectant and the disorder usually resolves spontaneously within a few days. Ho...
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