Aneurysm Rupture – Causes, Symptoms and Treatment
An aneurysm rupture occurs when a pathologically weakened and bulging blood vessel wall tears or bursts. It is a life-threatening emergency requiring immediate medical intervention.
Things worth knowing about "Aneurysm Rupture"
An aneurysm rupture occurs when a pathologically weakened and bulging blood vessel wall tears or bursts. It is a life-threatening emergency requiring immediate medical intervention.
What Is an Aneurysm Rupture?
An aneurysm rupture is the sudden tearing or bursting of an aneurysm – a pathological, sac-like or spindle-shaped bulge in the wall of a blood vessel. When the wall ruptures, blood escapes uncontrollably into surrounding tissue or body cavities, creating a life-threatening emergency. The most dangerous types involve ruptures of the aorta (the main artery of the body) and of cerebral arteries (intracranial aneurysms).
Causes and Risk Factors
Several factors contribute to the development of an aneurysm and increase the risk of rupture:
- Atherosclerosis: Plaque buildup weakens and damages vessel walls over time.
- High blood pressure (arterial hypertension): Chronically elevated pressure places constant stress on arterial walls.
- Genetic predisposition: Connective tissue disorders such as Marfan syndrome and Ehlers-Danlos syndrome significantly increase rupture risk.
- Smoking: Nicotine damages vessel walls and accelerates aneurysm formation.
- Vascular inflammation: Conditions such as vasculitis or infections (mycotic aneurysms) can weaken vessel walls.
- Trauma: Physical injury can directly damage arterial walls.
- Advanced age: Blood vessels lose elasticity and structural integrity with age.
Symptoms
The symptoms of an aneurysm rupture depend on the location of the affected vessel and typically appear suddenly and with great severity.
Rupture of an Aortic Aneurysm
- Sudden, tearing or stabbing pain in the abdomen, back, or chest
- Circulatory shock with rapidly dropping blood pressure, pallor, cold sweats, and loss of consciousness
- A pulsating mass may be felt in the abdomen
Rupture of an Intracranial Aneurysm (Brain Hemorrhage)
- Thunderclap headache: A sudden, extremely severe headache, often described by patients as the worst of their life
- Nausea and vomiting
- Neck stiffness (meningismus)
- Sensitivity to light (photophobia)
- Altered consciousness or loss of consciousness
- Neurological deficits such as paralysis, speech disorders, or visual disturbances
Diagnosis
Because an aneurysm rupture is a medical emergency, diagnosis must be made rapidly. The following investigations are used:
- CT angiography (CTA): The gold standard for rapid imaging of the aorta and cerebral arteries; visualizes the rupture site and extravasated blood.
- Cranial CT scan: Used to detect subarachnoid hemorrhage (bleeding into the cerebrospinal fluid space) in cases of intracranial rupture.
- Ultrasound (sonography): A fast, widely available initial assessment tool for suspected abdominal aortic aneurysm.
- Lumbar puncture: Performed when subarachnoid hemorrhage is suspected but CT findings are negative; tests cerebrospinal fluid for the presence of blood.
- MRI / MR angiography: Supplementary imaging used in stabilized patients for detailed assessment.
Treatment
Treatment of an aneurysm rupture is a medical emergency requiring immediate action. The primary goals are to stop the bleeding and stabilize the circulation.
Emergency Measures
- Immediate emergency call and intensive care monitoring
- Blood pressure stabilization and circulatory management
- Pain management
Surgical Treatment
- Open surgery: For aortic aneurysms, the ruptured segment is replaced with a vascular graft (open aortic reconstruction).
- Endovascular repair (EVAR/TEVAR): A minimally invasive procedure in which a stent graft is inserted via the femoral vessels and deployed in the affected aortic segment.
- Neurosurgical clipping: For intracranial aneurysms, the aneurysm sac is surgically sealed with a metal clip.
- Endovascular coiling: A minimally invasive alternative to clipping in which the aneurysm sac is filled with platinum coils to stop bleeding and prevent re-rupture.
Follow-up Care
After an aneurysm rupture, intensive rehabilitation, regular imaging follow-up, and consistent management of risk factors – such as blood pressure control and smoking cessation – are essential.
Prognosis
The prognosis following an aneurysm rupture is serious. The mortality rate for a ruptured abdominal aortic aneurysm remains around 40–50 % even after surgical repair. Approximately 30–40 % of patients with a ruptured intracranial aneurysm causing subarachnoid hemorrhage do not survive the first hours to days. Survivors frequently experience lasting neurological or physical impairments. Early detection and elective treatment of unruptured aneurysms is therefore critically important.
References
- Wanhainen A. et al. - European Society for Vascular Surgery (ESVS) 2019 Clinical Practice Guidelines on the Management of Abdominal Aorto-iliac Artery Aneurysms. European Journal of Vascular and Endovascular Surgery, 2019.
- Connolly ES et al. - Guidelines for the Management of Aneurysmal Subarachnoid Hemorrhage. Stroke, American Heart Association / American Stroke Association, 2012.
- Longo DL et al. (eds.) - Harrison's Principles of Internal Medicine, 21st edition. McGraw-Hill Education, 2022.
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