PubMed Health⌕ Search

Biomedical subjects

A C Taks

Publications and source records attributed to A C Taks.

11 recordsLinked to original sources
PubMed1992

Outcome of progression from carotid stenosis to occlusion.

The incidence of symptoms at the moment the internal carotid artery (ICA) occludes was assessed in 33 patients. Duplex scanning was performed to determine the progression from stenosis to ICA occlusion. There were 24 patients with a primary stenosis and nine with a restenosis after a carotid endarterectomy. In 18% (6/33) the occlusion was accompanied by a stroke. A transient ischaemic attack (TIA) was seen in 12% (4/33) of patients and 70% (23/33) remained asymptomatic. There was no difference in stroke rate between patients with primary stenosis (4/24:17%) and those with restenosis (2/9:22%). The mean follow-up was 3.2 years and the mean elapse time to occlusion in patients with a stroke was 20 months, with a TIA, 32 months, and in asymptomatic patients, 44 months. It was also shown that a stenosis of greater than 80% diameter reduction had a faster progression (mean 1 year) than a less than 80% stenosis (mean 3.5 years) (p = 0.04). Patients with a stenosis greater than 80% tended to have a higher incidence (40%:2/5) of stroke at the time of occlusion than patients with a stenosis less than 80% (14%:2/28). The results show that an occlusion of the ICA is accompanied by a stroke in 18% of the cases and that patients with a rapid progression and/or greater than 80% stenosis are at high risk. From this point of view a carotid endarterectomy should be considered in order to prevent an occlusion of the ICA and a high risk of stroke.

Aged↗
PubMed1991

Screening of the internal carotid arteries in patients with peripheral vascular disease by colour-flow duplex scanning.

The prevalence of internal carotid arterial disease was assessed in 416 consecutive patients with peripheral arterial disease (PAD). Colour-flow duplex scanning was performed to determine the extent of the disease. Major internal carotid artery disease (MICAD), meaning 75% stenosis and/or occlusion, was found in 14.9% (62) of the patients; 12.5% (52) had unilateral disease and 2.4% (10) had bilateral disease. In 7.7% (32) there was a stenosis of 75-99%. An occlusion was seen in 7.2% (30). No correlation was found between the severity of the internal carotid artery disease and the severity of the peripheral arterial disease. The 16.0% (60) prevalence in MICAD in patients with obstructive disease was significantly higher than the 4.7% (2) in aneurysm patients (p less than 0.05). The results show that there was no correlation between MICAD and the risk factors: hypertension, gender, age, diabetes mellitus, hypercholestolaemia, smoking and ischaemic heart disease. The high prevalence of MICAD in patients with PAD suggests that it would be useful to start a screening programme to determine if high grade stenosis should be operated upon.

Aged↗
PubMed1985

The use of autologous graft and human umbilical vein graft in femorocrural bypasses--a preliminary report.

In this article the results are presented with autologous saphenous and human umbilical vein grafts in the femorocrural crossing. Autologous saphenous vein grafts were employed in 22 limbs and the human umbilical vein grafts in 25 limbs. The results were retrospectively analysed by the Life-Table method. Follow-up was between six months and 21/2 years. The patency rates of the autologous saphenous vein graft was significantly better than that of human umbilical vein grafts.

Actuarial Analysis↗
PubMedDate not supplied

The hemodynamic significance of carotid coiling.

The cerebral perfusion pressure, as measured by ocular pneumoplethysmography (OPG-Gee), was used to evaluate the hemodynamic significance of carotid coiling in 25 patients, eight of whom had bilateral coiling. Positional studies were done with the head in the normal position and turned to the right and left. Seven of the 33 coilings (21%) were hemodynamically significant with the head in the normal position. A change in perfusion pressure when the head was turned was seen in 16 of 50 rotation studies (32%). There was a reduction in pressure in 11 instances and increase in five. In a control group of 24 subjects with normal angiograms, 18 of 48 studies (37%) showed a change in perfusion pressure with the head turned. Carotid coiling can be hemodynamically significant. Rotation of the head can compromise the carotid circulation whether coiling is present or not. OPG proved to be a simple means of evaluating the hemodynamic significance of carotid coiling and the effects of head rotation on the carotid circulation.

Blood Pressure↗
PubMedDate not supplied

A comparison of conventional and digital intravenous arteriography in the follow-up of femoro-crural bypass operations.

The value of intravenous arteriography, otherwise known as digital vascular imaging (DVI) in the late postoperative control of femoro-crural bypass operations is determined by comparing its results with those of conventional arteriography. Ten patients with 12 grafts were studied by both methods after a mean postoperative follow-up period of 83.5 months. DVI was 100% accurate in the determination of graft patency. In most patients it provided reliable information regarding the status of the distal anastomosis and the patency of the distal runoff. Since DVI has been proven accurate, has a good patient acceptance, and can be performed as an outpatient procedure, it is preferable to conventional arteriography for the objective documentation of long-term graft patency.

Aged↗