Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0022116 (ischemia)
 91,303 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Three patients with spinal dural arteriovenous fistula presented with acute and/or progressive myelopathy. The thoracic cord was focally enlarged and poorly defined on MR images in two of the patients. One individual showed focal cord atrophy, and one demonstrated abnormal intrathecal vessels. In all patients MR studies revealed cord enhancement after IV administration of gadopentetate dimeglumine. The MR findings are believed to represent disruption of the blood-cord barrier associated with cord ischemia and/or infarction, which, in turn, is caused by venous stasis resulting from the fistula. The diagnosis in each case was confirmed by the combined results of myelography, spinal arteriography, and surgery. Surgical excision or embolization of the fistula produced a poor return of lost function but an arrest in the progression of paresis. One of the patients had constant severe back and leg pain postoperatively, and a follow-up MR study 5 months after surgery showed focal atrophy and persistent enhancement of the thoracic cord. The patient with preoperative focal cord atrophy had an MR examination 1 year prior to surgery, which revealed enhancement of the cord similar to that seen on the immediate preoperative MR study. This patient also had severe pain in the back and lower extremities preoperatively, which accompanied her progressive paraparesis. It is believed that long-standing enhancement of the spinal cord in patients with dural arteriovenous fistula probably results from chronic progressive venous ischemia, which may be irreversible and cause pain of a central type.
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PMID:Venous infarction of the spinal cord resulting from dural arteriovenous fistula: MR imaging findings. 188 56

Coronary artery disease is an important and frequent complication of peripheral vascular patients (ASO). Therefore a non-invasive screening method is needed to decide the surgical indication for peripheral vascular patients. We studied the usefulness of stress scintigraphy (SSG) by using a bicycle ergometer. Forty-nine patients with chest pain or ECG abnormality were subjected to this study. Twenty-seven patients had coronary arteriography (CAG) performed on them. The redistribution image was noted 39 of the 49 patients who actually performed SSG. CAG was performed on 27 patients, and significant stenosis of the coronary artery was noted in 26 of them. Twenty-three of the 49 patients stopped exercising due to leg pain, but 10 out of 12 patients were noted in the redistribution image in 201Tl scintigraphy to have significant stenosis (sensitivity 83%). It is reported that SSG using a bicycle ergometer can detect ischemia with less stress than when a treadmill exercise test is used. In this study, 23 out of 49 patients stopped exercising due to leg pain but a high sensitivity of 83% was noted in these patients. This sensitivity was thought to be evidence enough to detect coronary artery disease in peripheral vascular patients. In summary, SSG is a useful screening method to detect coronary artery disease in peripheral vascular patients (ASO).
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PMID:[Usefulness of stress scintigraphy on screening coronary artery disease in peripheral vascular patients]. 201 95

This paper reports the determination of blood flow of the lower leg in 50 cases of non-insulin dependent diabetes mellitus (NIDDM) using an XLJ-2 Bipolar Rheoencephalometry Impedance Rheogram. In patients with leg pain (but without obvious vascular pathological changes, 85 legs) the blood flow was decreased. In male patients the blood flow of the left leg (9 legs) was 3.28 +/- 0.47 ml/100ml.tissue.min (mean +/- S), while that in the right leg (11 legs) was 3.88 +/- 0.80; in females, the blood flow of the left leg (32 legs) was 2.72 +/- 0.8; while that in the right leg (33 legs) was 2.94 +/- 0.66. These figures were significantly (P less than 0.01-0.001) lower than those obtained from normals. In diabetic feet (15 painful legs) the decrease of blood flow of the lower leg was more apparent: it averaged 1.87 +/- 0.79 for the left leg (7 legs) and 2.66 +/- 0.87 for the right leg (5 legs) in male patients. The values were significantly different when compared with those of normals (P less than 0.001) or with those of the diabetic patients with leg pain (P less than 0.05). These results demonstrated that determination of the blood flow of the lower leg of diabetic patients might aid in early discovery of the abnormal changes of blood supply to the lower legs in diabetes mellitus and judge the degree of ischemia. Of the 50 cases of diabetics 32 were Qi-Yin deficiency with blood stasis while the remaining 18 cases were deficiency of both Yin and Yang with blood stasis.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[Determination of blood flow of the lower leg in patients with diabetes mellitus and the effects of treatment with the principle of vitalizing blood and solubilizing thrombus]. 226 28

This prospective, double-blind study was carried out to assess the usefulness of magnetic resonance imaging (MRI) as a noninvasive method in the diagnosis of chronic compartment syndrome (CCS). As well, a new radiopharmaceutical known as methoxy isobutyl isonitrile that has been shown to be taken up by muscle in direct proportion to its blood flow was used to illustrate the possible pathophysiology of this syndrome. Twenty patients with a history of chronic leg pain and possible diagnosis of CCS and five normal volunteers had preexercise and postexercise MRI, nuclear medicine imaging, and static and dynamic slit catheter pressure studies. Nine patients had classic symptoms; only five of these nine had abnormal pressure studies. The other 11 patients had an element of pain at rest and had normal pressure studies. The nuclear blood flow studies were normal in all 25 legs tested in this study. Measurement of intrinsic MRI parameters T1 and T2 in the normal legs as well as in those with an atypical history showed a marked elevation with exercise and a gradual return to baseline postexercise that was similar to the pressure curves. In the five patients with a clinical history and elevated pressures, four had abnormal MRI studies with failure of T1 to return to baseline values. Although these results demonstrate the potential of MRI as a tool for noninvasively monitoring muscle status, clinical history and examination remain important in the diagnosis of CCS. This study indicates that the pathophysiology of exertional compartment syndrome does not appear to be related to ischemia.
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PMID:The use of magnetic resonance imaging in exertional compartment syndromes. 230 88

A simple bedside diagnostic maneuver, consisting of a bimanual compression of the gastrocnemius muscle and its use in the assessment of lower limb ischemia, are described. The compression evokes a pain response in the ischemic muscles and, when positive, is strongly suggestive of vascular insufficiency and, when absent, suggests a nonvascular etiology. Thus, the test is useful for the differentiation of vascular from nonvascular leg pain and is recommended as a diagnostic screening maneuver. Further diagnosis requires appropriate clinical judgment and the use of confirmatory tests.
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PMID:Gastrocnemius compression sign in arterial insufficiency of the leg. 358 28

The incidence of lower extremity ischemia secondary to acute aortic dissection is relatively low, however, the presenting symptoms are variable in term of severity. We report here in two cases of such circumstances who were successively differently treated. Case one was a 60 years old male presented with severe left leg pain. Even after the initiation of cardiopulmonary bypass, the leg ischemia did not improve, therefore selective leg perfusion was additionally performed through direct left femoral artery cannulation. The surgery toward dissection was completed by mean of simultaneous graft replacement of ascending aorta and aortic arch. The leg ischemia after the aortic procedure however had persisted, femorofemoral bypass was created to relieve the mal-perfusion. Case two was a 37 years old male admitted with severe left leg pain associated with sensory-motor nerve dysfunction with muscle rigidity. In this particular patient, femoro-femoral bypass was firstly reconstructed as the mean of leg salvage procedure. After we learned there was no serious reperfusion symptom manifested, we performed radical surgery toward the aorta. We believe that the decision making of surgical treatment for acute type A dissection complicated with the presence of lower extremity ischemia is based on the severeness of mal-perfusion.
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PMID:[Acute type A aortic dissection with leg ischemia]. 984 78

A 19-year-old female basketball player had chronic compartment syndrome. During basketball playing, she complained of bilateral lower leg pain that disappeared after several minutes of rest. The intracompartmental pressure in the anterior compartment was 41 mm Hg on the right side and 29 mm Hg on the left side immediately after playing. Prolonged ischemia of the anterior compartment was observed in comparison with four normal controls using near-infrared spectroscopy. Magnetic resonance imaging also revealed that the anterior compartment was mainly affected. Endoscopic fasciotomy was performed using an arthroscope, a transparent outer tube, and a retrograde blade. After the operation, her symptoms disappeared. Three months postoperatively, the anterior compartment pressure decreased and prolonged tissue ischemia improved. Endoscopic fasciotomy allowed us to cut the fascia safely and less invasively. We concluded that this technique is useful in treating chronic compartment syndrome in the anterior compartment of the lower leg.
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PMID:Chronic compartment syndrome of the lower leg: a new diagnostic method using near-infrared spectroscopy and a new technique of endoscopic fasciotomy. 1035 21

A 29-year-old woman presented with severe leg pain that had lasted for several weeks. During that period, she had taken painkillers in order to achieve sleep. In the week before she was admitted to hospital, she had noticed numbness and a cold feeling below her knees. There were no arterial pulsations below her groin, the skin of her legs being cold and pale. She had a history of chronic daily headache and had ingested Cafergot compound corresponding to ergotamine 2 to 3 mg daily for the previous 2 or 3 months. Angiography demonstrated severe narrowing of both superficial femoral arteries for a distance of about 5 to 6 cm and a subtotal stenosis of the right popliteal artery. After discontinuation of ergotamine, the patient's symptoms gradually disappeared within a few days. Angiography was repeated 2 days after the first examination and demonstrated regression of the spasms in the femoral arteries and reestablished flow in the distal vessels. Ergotamine tartrate can induce life-threatening ischemia of an extremity. Discontinuation of ergotamine is usually sufficient to reverse the ischemia, however, intravenous infusion of sodium nitroprusside may occasionally be necessary to avoid limb amputation.
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PMID:Limb-threatening ischemia due to ergotamine: case report with angiographic evidence. 1075 38

A 35-year-old man had significant left main coronary artery disease and required intra-aortic balloon catheter insertion owing to refractory ischemia before emergency coronary artery bypass graft. In the immediate postoperative period the patient started complaining of leg pain and diminished sensation in the right foot despite palpable pulses. The diagnosis of acute compartment syndrome of the right leg was made by an intracompartment pressure measurement of 90 mm Hg.
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PMID:Compartment syndrome from balloon pump. 1102 81

A 41-year-old woman presented to the Emergency Department complaining of a 4-day history of worsening lower leg pain, pallor, and a sensation of coolness aggravated by exertion. Evaluation revealed severe lower extremity vasospasm. She recently had been prescribed clarithromycin for "flu-like" symptoms, and for many years had been taking a caffeine-ergotamine preparation for migraine headaches. Clarithromycin is known to interfere with ergotamine metabolism. This drug interaction is often not recognized. Ergot alkaloids are commonly used for migraine headaches and have vasoconstrictive properties. In a patient with ergotamine toxicity, these vasoconstrictive properties can lead to frank ischemia. We reviewed the literature for reports of ergotamine-associated ischemia and for reports of ergotamine toxicity caused by drug-drug interaction.
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PMID:An unusual case of clarithromycin associated ergotism. 1172 70


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