Aortic Dissection: What It Is and Why Fast Care Matters

An aortic dissection arises when an intimal tear allows blood to force its way between layers of the aortic wall, creating a false channel and sometimes compromising flow in branch arteries. This split of the vessel wall can rapidly reduce blood flow to the heart, brain or other organs, and it may produce sudden, severe chest or back pain that patients describe as tearing. If the ascending aorta is involved, complications such as acute aortic regurgitation, coronary malperfusion or pericardial tamponade can follow and demand immediate surgical repair.

Hypertension is the predominant risk factor, while inherited connective tissue disorders, a bicuspid aortic valve and stimulant use are among other recognized contributors. Natural history studies have suggested that roughly forty percent of people with acute dissection die immediately and that many more will die within the first day if untreated, which explains why prompt recognition is vital. Over the last decades, surgical and endovascular advances have been associated with improved survival, but outcomes still depend on rapid transfer to experienced aortic teams.

Definitive diagnosis is established with imaging — most often CT angiography, MRI or transesophageal echocardiography — and initial management focuses on rapid blood pressure and heart rate control, commonly with intravenous beta blockers. Stanford Type A dissections require emergency open surgical repair; Type B dissections are frequently managed medically at first, with endovascular stent grafting reserved for complicated cases. Nevertheless, early intervention and specialist postoperative care have been shown to reduce mortality, and ongoing guideline updates reflect evolving evidence.