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Query: UMLS:C0038454 (stroke)
 147,016 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

10 healthy men aged 18 to 32 years underwent M-mode-echocardiographic studies at rest, during exercise and recovery. Semisupine bicycle exercise was performed using work loads of 25, 50, 75, and 100 W with measurements taken every minute. With increasing exercise, heart rate rose significantly (p less than 0.01) from 68/min to a maximum of 132/min, blood pressure as obtained by sphygmomanometry rose from a mean of 83 torr to 102 torr. Left ventricular enddiastolic dimension (EDD) did not change significantly with exercise, left ventricular endsystolic dimension (ESD) decreased from a group mean of 34.8 mm to 30.5 mm. This paralleled an increase in stroke dimension from 18.3 to 22.6 mm and of fractional shortening (FS) from 0.34 to 0.43. Mean velocity of circumferential fiber shortening (MVCF) rose from 1.01 circ/s to 2.06 circ/s. During recovery, heart rate and blood pressure returned faster to resting levels than did ESD, FS, and MVCF. Again EDD did not change. These data indicate that heart rate contributes more to the increases in cardiac output observed with ergometric exercise than does stroke volume; with moderate exercise levels this increase in stroke volume is produced by diminishing endsystolic volume whilst enddiastolic volume remains unchanged.
Z Kardiol 1979 Dec
PMID:[Echocardiographic dimensions of the left ventricle during ergometric exercise: results in normal subjects (author's transl)]. 54 99

The change in left ventricular volume during a representative cardiac cycle was assessed in 19 patients with CAD and 8 control subjects before and after 10 mg isosorbiddinitrate sublingually. 15mCi99mTc-HSA were administered intravenously. After the tracer had equilibrated, the precordial changes of activity were measured with a gamma-camera connected to a computer. In order to determine the overall left-ventricular function from volume curves, the ejection fraction, the maximal systolic ejection rate and the maximal diastolic filling rate of the left ventricle were measured. For the assessment of regional wall motion abnormalities the volume changes were observed in a cinemode on a colour video display. In addition the relative changes of regional EF, regional stroke volume and the timing of endsystole were recorded as a functional scintigram. The results showed very clear differences between control subjects and patients with CAD. Furthermore differences existed between patients with hypokinesia and those with akinesia or aneurysm. The results emphasize that quantitative gated nuclear cardiography not only provides information concerning the left ventricular function but also allows the assessment of local wall motion as to reversible or irreversible asynergy.
Z Kardiol 1979 Dec
PMID:[Quantitative gated nuclear cardiography in coronary artery disease after administration of isosorbiddinitrate (author's transl)]. 54 1

Nineteen patients undergoing abdominal aortic aneurysm surgery were randomly assigned to two groups and investigated to elucidate the mechanisms of declamping hypotension. The control group of nine patients was kept at an average mean pulmonary artery occlusion pressure (MPAOP) of 11 mmHg (1.46 kPa) before declamping. The other group was volume loaded to a MPAOP of 16 mmHg (2.13 kPa) shortly before declamping. Following declamping there was a significantly greater decrease in mean arterial pressure in the control group, with the same reduction of MPAOP in both groups. In parallel, cardiac and stroke volume indices decreased in the control patients, but remained unchanged in the volume-loaded patients. In the control group there was a reduction in myocardial substrate utilization which was not seen in the volume-loaded patients. No signs of myocardial ischemia could be demonstrated in any of the groups. The results indicate that mismatching between intravascular volume and blood volume is the main cause of infrarenal aortic or common iliac artery declamping hypotension. Volume loading before declamping to a slightly elevated MPAOP can effectively prevent hypotension, while a normal MPAOP does not guarantee a stable hemodynamic situation after declamping.
Acta Anaesthesiol Scand 1979 Dec
PMID:Hemodynamic and cardiometabolic effects of infrarenal aortic and common iliac artery declamping in man--an approach to optimal volume loading. 54 93

The heart rate performance, cardiac output and catecholamine excretion were observed at rest in the ergometer test (40 min at 50 watts) in a group of 8 pregnant women whose case history and clinical record did not reveal any abnormal findings, during the course of pregnancy (20th, 28th and 36th weeks of pregnancy) as well as 2 and 12 weeks post partum. It was found that the cardiac output increased, dependent upon the heart rate, the stroke volume remaining approximately constant (max. + 60%) during pregnancy, compared with the controls post partum. There is a close linear correlation (r = 0.983) between the measured heart rates and the corresponding excretion of epinephrine (adrenalin) with the urine at rest and under load. It may be assumed that there is a causative link between the increase in secretion of catecholamine by the mother and the well-known change in cardiac output during pregnancy.
Z Geburtshilfe Perinatol 1979 Dec
PMID:[Adrenalin and cardiac output in pregnancy (author's transl)]. 54 43

By the combination of radiocardiography, ergooxytensiometry and heart probing on 22 lobectomized, cone- and segment-resected patients, respectively could be established in comparison to control groups that also after parenchyma-saving lung resection a pulmonary load parenchyma-saving lung resection a pulmonary load hypertension develops in 15 patients. The sequel of this increase of pressure and resistance in the pulmonary circulation is a functional insufficiency of the heart in 11 cases which is to objectify by reduction of the stroke volume, increase of the end-diastolic and end-systolic volume and by reduction of the contractility of the myocardium.
Z Gesamte Inn Med 1979 Dec 01
PMID:[Cardiopulmonary function after segmental resection of the lung]. 55 Jun 19

A new formula is proposed to calculate left ventricular ejection volume. It has been originated directly from Yeh equation, introducing two important factors: 1) left ventricular and diastolic diameter 2) ejection time adjusted according to heart rate. This new formula prove to give satisfactory results both as to stroke volume and cardiac output, thus allowing its possible clinical application.
Boll Soc Ital Biol Sper 1979 Dec 30
PMID:[Echocardiographic calculation of left ventricle ejection volume. 2) Proposal of a new equation]. 55 69

F responses were elicited from both hands of patients shortly after they sustained unilateral cerebrovascular lesions. In 17 of 29 patients, significant abnormalities were found; F responses occurred with decreased persistence and/or amplitude on the clinically involved side, a change which was seen only in patients studied within 4 weeks of the ictus. The most prominent changes (in comparison with the clinically uninvolved side) occurred with extensive lesions. The abnormalities of F response correlated clinically with severity of the weakness, decrease in tone, and decrease in deep tendon reflexes. These changes in F response are consistent with a decreased "central excitatory state" at the spinal segmental level during the early phase after a supratentorial stroke.
Neurology 1978 Dec
PMID:Assessing segmental excitability after acute rostral lesions. I. The F response. 56 85

A 61-year-old hypertensive diabetic man awoke with a numb, heavy right arm and leg; symptoms progressed within 30 hours to a dense right hemisensory syndrome involving head, face, trunk, arm, and leg, accompanied by a right hemiparesis, involving tongue, face, arm, and leg with extensor plantar response, leaving him barely able to move the arm and leg against gravity. No impairment in alertness, memory, language, praxic, or visual functions was evident at any time. Improvement in motor function began in 24 hours and progressed to walking status by discharge on day 23. Eight days passed before the sensory deficit showed improvement, and it was still prominent at discharge. Autopsy three months later showed a 4 X 2 X 4-mm lacune in the ventral posterior nucleus of the left thalamus, with a zone of pallor on stained microscopic sections extending into the immediately adjacent posterior limb of the internal capsule. This case appears to be unique in that a sensorimotor stroke has been produced by a confirmed thalamocapsular infarct.
Arch Neurol 1977 Dec
PMID:Sensorimotor stroke due to thalamocapsular ischemia. 58 93

We describe a new method of classifying stroke using a cumulative numbering system. The method is simple and more explicit than currently used classifications, and could be useful for different agencies looking after patients with stroke in hospital or at home.
Br Med J 1977 Dec 17
PMID:New classification of stroke: preliminary communication. 58 52

Although a probable initial diagnosis may be suggested by computed cranial tomography, the diagnostic accuracy is often increased by the complementary use of other neuroradiologic studies. The use of CT scanning is conjunction with other more invasive neuroradiological studies results in improved diagnosis and patient management in almost the entire spectrum of neurosurgical diseases-- subarachnoid hemorrhage due to aneurysm, stroke, trauma, normal pressure hydrocephalus, and especially neoplasms.
Surg Neurol 1977 Dec
PMID:Complementary role of computed tomography and other neuroradiologic procedures. 59 83


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