What is IVUS coronary?

What is IVUS coronary?

Intravascular Ultrasound (IVUS) is a catheter-based diagnostic procedure used to view the inside of a coronary artery, providing a real-time view.

What is IVUS guided PCI?

Background. Intravascular ultrasound ( IVUS ) guidance during percutaneous coronary intervention ( PCI ) offers tomographic images of the coronary vessels, allowing optimization of stent implantation at the time of PCI .

How is the IVUS procedure done?

IVUS uses a special catheter with a small ultrasonic transducer on one end. The doctor threads the catheter through an artery or vein to the target location. Once there, the transducer generates sound waves to produce images of the blood vessels and help assess various conditions.

What is the purpose of IVUS?

Intravascular ultrasound (IVUS) is a diagnostic test. This test uses sound waves to see inside blood vessels. It is useful for evaluating the coronary arteries that supply the heart.

Is IVUS considered intervention?

IVUS remains a niche technology in interventional cardiology. The 2018 Society for Cardiovascular Angiography and Intervention guideline considers IVUS to be definitely beneficial in achieving optimal stent result and probably beneficial in guiding PCI in complex lesion subsets (3).

How is IVUS measured?

IVUS Measurements In defining atherosclerotic plaque burden, plaque media area (PMA) was calculated by subtracting EEM area by MLA area in lesion. PAS percentage (%) was measured using the formula (PMA/EEM area) ×100.

What is ring down for IVUS?

2 Ring-Down Artifacts. A luminous ring of false images surrounding the transducer or the catheter of IVUS, which presents as several layers around the catheter that compromise evaluation of the area adjacent to the catheter (Fig. 2.2). Often it is called near-field artifacts when using other medical ultrasound devices.

Why is IVUS used?

What are A and B scans in OCT?

In OCT many one-dimensional scans (a-scans) are performed at several depths to create a two-dimensional image (b-scan). Those b-scans, if acquired closely and rapidly, can be translated into a volumetric image (c-scan) of a retina, for example.

What is a Venogram with IVUS?

Additional images may be taken with the use of a special catheter that has an ultrasound device on the tip. This is called IVUS(Intravascular Ultrasound) and is used to gather more detailed information about the amount of plaque or blockage inside the artery.

What is the difference between a-scan and B scan?

There are two main types of ultrasound used in ophthalmologic practice currently, A-Scan and B-scan. In A-scan, or time-amplitude scan, sound waves are generated at 8 MHz and converted into spikes that correspond with tissue interface zones. In B-scan, or brightness amplitude scan, sound waves are generated at 10 MHz.

What is OCT angiography used for?

OCT angiogram of a normal eye illustrating detailed microvasculature in the macula. The foveal avascular zone is seen in the center of the macula. Optical coherence tomography angiography (OCT-A) has emerged as a non-invasive technique for imaging the microvasculature of the retina and the choroid.

What is the difference between angiographic CAV and IVUS?

Angiographic CAV severity ranged from none (CAV0) to mild (CAV1), whereas IVUS CAV severity ranged from none (Stanford grade I) to severe (grade IV). Maximal intimal thickness measured with IVUS was significantly greater in the LAD (0.84 ± 0.48 mm) than in the LCX (0.46 ± 0.32 mm) or the RCA (0.53 ± 0.41 mm, P = .005).

Does IVUS guided des implantation reduce mace in LMCA?

Five meta-analyses of up to 3 RCTs and 17 registry studies have shown that IVUS guided DES implantation was associated with a reduction in MACE including mortality, myocardial infarction, ST, and repeat revascularization. Figure 3: MACE in Seven Studies of IVUS Versus Angiography-Guided DES for LMCA Disease

Are all IVUS devices the same?

All commercially available IVUS technologies produce equally valid diagnostic information, especially in the setting of PCI. It is a matter of personal preference; however, it should be noted that catheters, motor drive or patient interface units, and consoles are not interchangeable among companies.

Is intravascular ultrasound of the proximal left anterior descending artery enough to detect cardiac vasculopathy?

Intravascular ultrasound of the proximal left anterior descending artery is sufficient to detect early cardiac allograft vasculopathy Clin Transplant. 2018 Feb;32(2).doi: 10.1111/ctr.13167. Epub 2017 Dec 14. Authors

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