Alcohol Use Disorder and Cardiovascular Disease:An Overlooked Connection for Veterans

New research strengthens the medical connection between excessive alcohol consumption and cardiovascular disease—highlighting potential secondary service connections that deserve greater attention.

For many Veterans, alcohol use began as a way to cope with the physical or emotional consequences of military service. Some turned to drinking to manage PTSD, anxiety, depression, traumatic brain injuries (TBI), chronic pain, or other service-related difficulties. What began as temporary relief sometimes developed into years of harmful drinking or alcohol use disorder (AUD).

While the connection between PTSD and alcohol misuse is widely recognized, other service-related conditions—including TBI, chronic pain, depression, and anxiety—are often overlooked as potential contributors to harmful drinking.  That said, regardless of what traumatic event was the catalyst for a veteran’s drinking, the long-term cardiovascular consequences of excessive alcohol consumption can be serious, even life-threatening, and deserve serious attention when evaluating secondary service connections for Veterans.

Recent research reinforces the association between excessive drinking and hypertension, coronary artery disease, abnormal heart rhythms, cardiomyopathy, and heart failure. For Veterans whose AUD developed as a consequence of a service-connected disability, these findings may reveal an important secondary connection that has not yet been evaluated.

New Research Strengthens the Alcohol–Cardiovascular Disease Connection

A 2026 study published in Nutrition, Metabolism and Cardiovascular Diseases provides particularly compelling evidence. Using genetic data from 337,463 participants, researchers found evidence supporting causal relationships between alcohol consumption and several health conditions, including a 34% increase in the odds of essential hypertension and a 63% increase in the odds of cerebrovascular disease. 

Additional 2026 research strengthens the connection to atrial fibrillation, a potentially serious abnormal heart rhythm. A systematic review and network meta-analysis involving 13 prospective studies and more than 80 million person-years found that heavy alcohol consumption—60 grams or more daily—was associated with 2.84 times the risk of atrial fibrillation compared with low alcohol consumption.

Research involving Veterans provides further perspective. An August 2026 study from the VA's Million Veteran Program examined 438,442 Veterans and evaluated alcohol consumption in relation to heart attacks, strokes, and cardiovascular deaths. Researchers identified a J-shaped relationship, with lower observed cardiovascular event rates among moderate drinkers than among heavier drinkers.

A separate 2025 study involving 432,265 adults found that individuals exceeding weekly drinking limits—15 or more drinks for men and eight or more for women—had a 26% higher adjusted risk of coronary heart disease over four years. Importantly, this association remained after accounting for smoking, obesity, hypertension, diabetes, and elevated cholesterol.

Together, these studies provide substantial support for considering excessive alcohol consumption as a potential cause or contributing factor in cardiovascular disease.

How Alcohol Contributes to Cardiovascular Disease

Prolonged excessive drinking can affect cardiovascular health through several mechanisms:

• Hypertension: Alcohol can increase blood pressure through effects on the nervous system and blood vessels, placing sustained strain on the heart.

• Coronary artery disease: Heavy drinking is associated with increased coronary disease risk, including through hypertension and adverse metabolic effects.

• Arrhythmias: Alcohol can disrupt the heart's electrical activity, increasing the risk of atrial fibrillation.

• Cardiomyopathy and heart failure: Long-term excessive alcohol exposure can damage heart muscle cells, weakening the heart and reducing its ability to pump blood effectively.

These effects may develop gradually, making a Veteran's long-term drinking history particularly relevant when cardiovascular disease emerges years later.

More Than a PTSD Related Connection

PTSD is a clear catalyst for excessive alcohol abuse in some Veterans. But it is not the only military-related condition associated with alcohol misuse.

A 2025 study published in the Journal of Addiction Medicine examined a national cohort of post-9/11 service members and Veterans. Researchers found that individuals with TBI were more likely to receive a subsequent AUD diagnosis. Compared with those without TBI, the adjusted hazard was 25% higher following mild TBI, 34% higher following moderate-to-severe TBI, and 90% higher following penetrating TBI. 

Depression, anxiety, chronic pain, and other consequences of military service can also contribute to harmful drinking. Some Veterans use alcohol to manage emotional distress, physical discomfort, or disrupted sleep. Although individual circumstances vary, the resulting pattern of excessive drinking may have significant long-term cardiovascular consequences.

For Veteran Advocates, recognizing why drinking began is an important first step. But the medical connection should not, and does not end with AUD.

Connecting the Cardiovascular Diagnosis

When AUD develops as a consequence of a service-connected disability, secondary service connection for AUD itself should be considered. The next question is whether alcohol use disorder subsequently caused or aggravated cardiovascular disease.

Some Veterans may have experienced years of harmful drinking without receiving a formal AUD diagnosis. Others may have received treatment but never considered whether their hypertension, coronary artery disease, atrial fibrillation, cardiomyopathy, or heart failure could be connected.

Advocates should examine the reasons for the Veteran’s drinking, the duration and severity of alcohol consumption, the history of AUD, and the development or aggravation of cardiovascular disease.

Looking Beyond the Original Service-Connected Condition

Cardiovascular disease linked to years of excessive drinking may develop long after military service. For Veterans whose AUD resulted from a service-connected condition, the later development of cardiovascular disease may represent an additional, potentially compensable secondary disability.

The growing body of research, including significant new findings published in 2026, provides compelling reasons to examine these connections.

Veteran Advocates should understand that alcohol abuse for Veterans can be caused by traumatic events and conditions beyond PTSD. They should also know that cardiovascular disease linked to sustained alcohol consumption can develop years after service and should be considered for secondary service connection, especially those already service-connected for AUD. MedConnectVA can also assist by performing a medical pre-screening of your case without cost or obligation.