Preliminary findings from the District of Columbia's Office of the Chief Medical Examiner have identified the cause of death for Sen. Lindsey Graham, 71, as an aortic dissection due to arteriosclerotic cardiovascular disease. Graham was transported to George Washington University Hospital, where he was pronounced dead on Saturday evening. An autopsy was completed Sunday.
An aortic dissection is a life-threatening medical emergency that occurs when a tear develops in the inner layer of the aorta, the body's largest artery. Blood rushing through the tear can cause the aortic wall's layers to separate, potentially disrupting blood flow to vital organs or leading to a fatal rupture if not treated immediately. According to Dr. Marc Siegel, a senior medical analyst for Fox News, the condition can manifest within minutes or days and may be difficult to recognize.
Dr. Kenneth Perry, an emergency physician, likened the aorta's layered wall to that of a hose, where separated layers can impede normal fluid flow. He explained that this often begins with a small tear that progresses due to high blood pressure, preventing blood from reaching other organs and leading to tissue death from oxygen deprivation. Survival typically depends on very early identification and strict blood pressure control with emergent operative management.
The preliminary findings in Graham's case pointed to arteriosclerotic cardiovascular disease, a condition commonly associated with atherosclerosis. This condition involves plaque buildup within arteries, causing them to harden and narrow over time, which can weaken the aortic wall and increase the risk of dissection.
High-risk groups for arteriosclerotic cardiovascular disease and subsequent aortic dissection include individuals with uncontrolled high blood pressure, older adults (particularly those in their 60s and 70s), men, those with existing atherosclerosis or other cardiovascular diseases, people with aortic aneurysms, individuals with certain congenital heart defects like a bicuspid aortic valve, and those with inherited connective tissue disorders such as Marfan syndrome. Smokers, individuals with high cholesterol, diabetes, obesity, and those who are physically inactive or have unhealthy diets are also at increased risk.
Symptoms of an aortic dissection can arise suddenly and may mimic those of a heart attack or stroke. Experts advise immediate emergency medical care for anyone experiencing severe chest or upper back pain often described as tearing or stabbing, shortness of breath, sudden severe abdominal pain, loss of consciousness, stroke-like symptoms, or leg pain and difficulty walking.
Emergency physicians often consider aortic dissection when a patient presents with chest pain, especially if it is described as a tearing sensation and accompanied by elevated blood pressure. The pain can be intense, leading some to describe the patient's experience as akin to having a severe kidney stone.
Early diagnosis and treatment are crucial for improving survival rates. Diagnosis typically involves imaging tests such as CT scans, transesophageal echocardiograms, MRIs, and chest X-rays. Treatment varies depending on the affected part of the aorta. Type A dissections, involving the ascending aorta near the heart, usually require emergency surgery. Type B dissections, affecting the descending aorta, may be managed with medications to lower blood pressure and heart rate, though surgery or stent placement may also be necessary.
Untreated acute aortic dissections have a high mortality rate. The risk of death can increase significantly with each hour of delayed treatment for Type A dissections. Without intervention, more than half of patients with a Type A dissection die within a month.
While not all aortic dissections can be prevented, individuals can reduce their risk by managing risk factors. This includes maintaining controlled blood pressure, keeping cholesterol levels low, regular medical check-ups, quitting smoking, maintaining a healthy weight, and adhering to treatment plans for underlying heart conditions. Those with a family history of aortic disease or connective tissue disorders should discuss screening with their healthcare provider.