左前降支動脈（left anterior descending artery，LAD）又稱左冠狀動脈前室間支、前降支，是左冠状动脉的分支，為供應心臟的一條重要血管[1]。
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Coronary arteries (labeled in red text)
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The arch of the aorta, and its branches.
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Heart attack
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Cardiac vessels
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Human heart with coronary arteries
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Heart coronary territories
本條目包含來自屬於公共領域版本的《格雷氏解剖學》之內容，而其中有些資訊可能已經過時。
Topol, Eric J.; Califf, Robert M. Textbook of Cardiovascular Medicine. Lippincott Williams & Wilkins. 2007: 283 [6 November 2014]. ISBN 9780781770125. The most worrisome type is the proximal left anterior descending (LAD) MI, often referred to as the widow-maker infarction, which carries a high mortality and is attributed to an occlusion of the LAD before or at the first septal perforator.
