Doctor insights on:
Digital Subtraction Angiography
Specific xray series: Digital subtraction arthography is a special radiographic technique in which the black and white sequence is reversed on the image. It is used to as an additional technique to allow the radiologist to assess different body parts, including the joints and blood vessels. ...Read more
encompasses several medical imaging tests that visualize the anatomy and pathology of blood vessels. Standard angiography involves catheterizing a vessel and injecting contrast under X-ray visualization. Less invasive angiographic techniques include MR angiography ...Read more
Doppler Ultrasound: Ultrasound has proven to be cost-effective and quite accurate in determining the degree of narrowing in the carotid artery. Many vascular surgeons, including myself, solely rely on it to decide whether someone needs an operation. Mra is not so good and over-estimates the actual degree of narrowing. I would not rely on its findings to decide on operating. As mentioned a cta is much better. ...Read moreSee 1 more doctor answer
Debatable: Few vascular surgeons make decisions on carotid artery stenosis based on mr, as carotid doppler (ultrasound) has been proven to be very reliable when a good technologist performs the study. From what you're describing, your carotid arteries are likely without disease as the reporting standards for ultrasound haven't quite been set. In my lab you'd likely be found to have no disease at all. ...Read more
CTA: Cardiac computed tomographic angiograpy is performed to try and diagnose cardiac anatomy and pathology. It doesn't diagnose everything but can provide very useful information that often yield a diagnosis if the study is ordered appropriately. ...Read more
CT angiogram: It is being done much more often when it is necessary to visualize blood vessels (for example to see if there's a blockage). There is some radiation involved but it is considered much less "invasive" and has less complications than the regular type of "angiogram", where blood vessels are visualized by inserting thin tubes called catheters directly into them to inject a dye. ...Read moreSee 2 more doctor answers
It depends: On regular contrast-enhanced ct exams, cardiac abnormalities including masses or thrombus can be detected, but little information regarding the coronary arteries can be obtained. On a dedicated coronary ct exam with contrast (ekg gated), the coronary arteries can be evaluated for narrowing or blockages. This is usually not possible on regular ct exams due to motion. ...Read moreSee 1 more doctor answer
Is magnetic resonance venography without contrast as accurate as mrv w/ contrast? Is mrv good accurate for distal clots?
MRV advantages: "Contrast media-enhanced MRV, however, is more reproducible and less susceptible to artifacts." "...MRV to have both high sensitivity (range, 87.5%–94.5%; pooled sensitivity, 92%) and specificity (range, 92.6%–96.5%; pooled sensitivity, 95%)" http://www.guideline.gov/content.aspx?id=47686 Advantages: deep calf, abdominal, and pelvic vein imaging. can show source of compression ie. source. ...Read more
When measuring ascending aorta size(horiz)from sinotobular junction to innominate artery is cardiac mri/mra for morphology more accurate test than cta?
Depends: Done properly, ideally with ECG gating, an aortic MRA is equivalent to an aortic CTA. The opinion from some vascular docs is an overestimation on MRA. This was probably from movement artifact and older scanners. The benefit of MRA is the lack of iodinated contrast and lack of radiation. It is in routine use at many large medical facilities to periodically track aortic enlargement- kids/adults ...Read more
Which procedure is more useful to detect artery blockage, angiography, CT angiogram, or cardiac catheterization and why?
May depend on doctor: A good position for a rectal exam is a one where the anus is accessible to the doctor's finger, and the doctor feels he is able to get a really good exam: lying on the side, bent over the examination table, or lying down with feet in stirrup (lithotomy position), etc... The position is not that important. What's important is that the dr. Is able to reach and feel everything he wants to examine. ...Read more
Ct vs cath: In simplest terms the ct angiogram would be safer than a coronary angiogram, however, they are usually used in different circumstances. The ct angiogram is useful as a screening tool to see if coronary disease is present. A cardiac catheterization is performed when a patient has an acute coronary syndrome or a myocardial infarction to evaluate coronary disease, or even treated. ...Read moreSee 1 more doctor answer
Carotid artery disease, different results from duplex ultrasound vs. Ct angiogram (cta), is that possible?
No screening: There is nothing called screening for mesenteric stenosis. If you have no symptoms then you no need to screen for occlusion. If you have chronic symptoms then duplex ultrasound is a good starting test but has a lot of limitations. In cases of acute ischemia then ct scan is best to start with. ...Read moreSee 2 more doctor answers
Both safe: Both also have risks such as radiation and contrast usage. Coronary arteriography has small bleeding risk at puncture site. Need to get the right test for your problem. Coronary arteriography is the gold standard. ...Read more
Arteries: A ct angiogram takes pictures of the coronary, or heart, arteries. It also gives information of the remaining cardiac structures. The main pumping chambers, or ventricles, the heart muscle walls and some information regarding the heart valves as well. If there are bypass grafts from previous surgeries, these can often be visualized as well. ...Read moreSee 1 more doctor answer
It depends upon: What the indication is, and what symptoms or problems you're having. Depend upon your doctor's recommendation. ...Read more
Why not?: This procedure is usually done under light sedation. They may let you listen to music. It wouldn't hurt to ask. ...Read more
Digital subtraction angiography. How long does the test take and what happens in it? Can u run me through step by step? :) is it noisey?
Long answer: This would be a long answer. But basically dsa is performed in a suite with x-ray. A catheter is placed unto the artery usually from the groin. You will be sedated some. X-ray contrast is injected into artery in the area of the to be evaluated. The x-ray will take a movie of the contract in the artery as it moves. At the end the catheter will be removed and pressure held till the bleeding stops. ...Read more
Cards or vascular: Angio refers to vessel so could be any vessel, but most frequently refers to coronary (heart) vessels, therefore cardiologist usually performs. Other common vessels include aortic and femoral / iliac vessels, carotids, renal arteries and mesenteric vessels. These vessels are often imaged by interventional radiologists or vascular surgeons. ...Read moreSee 1 more doctor answer
Not risk-free: When done by a well trained/experienced physician, it should be a safe procedure however that does not mean that it is free of risk. If determined to be necessary, the benefits of the test should outweigh the risks. The physician performing the test should discuss risks and benefits with the patient prior to angiography. ...Read more
Angiography: encompasses several medical imaging tests that visualize the anatomy and pathology of blood vessels. Standard angiography involves catheterizing a vessel and injecting contrast under X-ray visualization. Less invasive angiographic techniques include MR angiography and CT angiography . ...Read moreSee 2 more doctor answers
List of allergies: Bring a list of allergies and a list of meds you take. Your kidney function is important and your doctor will have checked it with a blood sample. Do not eat for at least 4 hours before the test. If you have diabetes, depending on the time of your exam, you might be asked to hold some or all of your dm med. Aspirin is ok but other blood thinners are often held. ...Read more
Verb versus noun: Angiography is the process of performing an x-ray picture (or an image) of a blood vessel by injecting the vessel with an opaque dye. Th dye often contains iodine. An angiogram is the picture of the blood vessel that was taken while performing angiography. ...Read moreSee 1 more doctor answer