![]() Prevalence of Dual Left Anterior Descending Artery Variations in CT Angiography. ![]() ![]() Bozlar U, Ugurel M, Sari S, Akgun V, Ors F, Tasar M. Read it at Google Books - Find it at Amazon Indicates acute occlusion of the proximal LAD It provides the major blood supply to the interventricular septum, and bundle branches of the conducting systemīlockage of this artery can lead to impairment or death (infarction) of the conducting system The LAD is the most commonly occluded of the coronary arteries Occlusion of LAD leading to myocardial infarction or sudden cardiac death the mid 1/3 rd of the LAD is known on occasion to course through the myocardium, known as myocardial bridging does not have any clinical significance It is important to know of this variation when planning surgical vascularization 3 Variant anatomyĭual left anterior descending coronary artery 2: two left anterior descending coronary arteries (one usually shorter in length) that are both situated in the anterior interventricular groove The LAD supplies the anterolateral myocardium and apex with one of its branches supplying the anterior two-thirds of the interventricular septum. The great cardiac vein ascends in the anterior IV groove with the LAD The LAD lies in the epicardial fat within the anterior interventricular septum 1: Type III: long wrap-around vessel (around the apex) Type I: short vessel (can terminate before apex) On angiography, it may be reported as types I-III: The length of the LAD can be highly variable. The LAD should arise from the left coronary cusp which lies between 3 and 6 o'clock on an axial view. Mid: from the origin of D1 to half the distance from the D1 origin to the apexĭistal: distal to half the distance from the D1 origin to the apex Proximal: from the origin to the first diagonal branch (D1) (although some authors use the first septal perforator (S1) as the landmark) septal perforators: course to the right towards the septum on axial CTCAĭiagonal branches: course to the left on the anterolateral wall of the left ventricle on axial CTCA It can be divided into proximal, mid and distal segments and this helps to differentiate the names of its various small branches 1: It descends along the interventricular groove. However, women are also killed by disease at this location 6. The left anterior descending artery is often given the sobriquet, the widow-maker, particularly by the lay media, due to the propensity for proximal disease of the left anterior descending artery to cause the death of male partners.
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