Depression is not only a mental health challenge but also a serious risk factor for heart disease, according to new research that analysed data from more than 60,000 patients worldwide. The findings were published in the journal Molecular Psychiatry.
The study shows that one in five people living with cardiovascular disease also experience depression, and these patients face a significantly greater risk of dying from any cause compared with those without depressive symptoms
Researchers examined 39 studies involving over 63,000 individuals with cardiovascular conditions, including coronary artery disease and heart failure. They found that nearly 21% of patients had depression, with the rate rising to almost 25% among those with heart failure. Anxiety was also common, affecting nearly one in four patients
The findings underline how mental health problems can worsen physical illness. Patients with both depression and cardiovascular disease were shown to have more than double the risk of death compared with those who were not depressed
This highlights the urgent need for routine screening and support for depression and anxiety in people receiving treatment for heart conditions.
The team also went beyond traditional analysis by using a genetic method known as Mendelian randomisation. This approach examines genetic data to assess whether one condition may cause another. Their results revealed that depression can contribute directly to the development of several types of heart disease, including coronary artery disease, heart failure, hypertension, and heart attack.
Conversely, certain forms of cardiovascular disease also increased the likelihood of developing depression. This bidirectional relationship means that heart disease and depression feed into each other, creating a cycle of poor health outcomes
Experts note that this work provides the strongest evidence yet that treating depression in people with cardiovascular disease is not only essential for mental well-being but also for protecting the heart. Addressing depression early could help reduce the risk of fatal outcomes linked to heart conditions.
The study authors recommend that cardiology clinics integrate mental health screening into routine care. Interventions such as therapy, tailored support programmes, and appropriate medical treatment could improve both mental health and cardiovascular outcomes.
These findings arrive at a time when cardiovascular disease remains the leading cause of death globally and depression continues to be a major source of disability. Understanding the connection between the two conditions could pave the way for more effective treatment strategies.
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