Are Heart or Circulatory Issues Mistaken for ADHD Behaviours?

PostedSeptember 10, 2025

UpdatedSeptember 10, 2025

ByMy Patient Advice

Author: Harriet Winslow, BSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Heart issues mimicking ADHD is a concern when diagnosing attention-related behaviours. Both heart or circulatory problems and ADHD can lead to restlessness, inattention, and difficulty concentrating. However, the underlying causes of these behaviours are quite different, and distinguishing between the two is crucial for accurate diagnosis and treatment.

Heart or circulatory issues, such as cardiovascular symptoms, can lead to physical discomfort, shortness of breath, dizziness, and fatigue. These symptoms can result in restlessness and difficulty maintaining focus, which might be mistaken for ADHD-related behaviours. Individuals experiencing heart issues may feel constantly tired or struggle with concentration due to reduced blood flow or oxygen supply to the brain. In contrast, ADHD is a neurodevelopmental disorder that involves persistent patterns of inattention and hyperactivity, unrelated to physical health issues.

Common Symptoms: Heart Issues Mimicking ADHD

Cardiovascular Symptoms

Cardiovascular symptoms such as chest pain, dizziness, and breathlessness can lead to restlessness and difficulty focusing, resembling the signs of ADHD. However, these symptoms are typically linked to a physical health condition, not a behavioural one.

Restlessness

Both conditions can cause restlessness, but in heart issues, the discomfort and fatigue lead to agitation. In ADHD, restlessness is generally due to an inability to control impulses and sustain attention.

Inattention

While both heart issues and ADHD can cause inattention, the cause is different. In ADHD, inattention stems from neurological factors, whereas in heart problems, it is often due to physical fatigue or discomfort.

By recognising the differences between heart issues mimicking ADHD and true ADHD symptoms, healthcare professionals can ensure the correct diagnosis and treatment approach for each individual.

Visit providers like ADHD Certify for personal consultations and expert advice tailored to your needs.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Rule-outs for other conditions.

Harriet Winslow, BSc

Author

Harriet Winslow is a clinical psychologist with a Bachelor’s in Clinical Psychology and extensive experience in behaviour therapy and developmental disorders. She has worked with children and adolescents with ADHD, autism spectrum disorder (ASD), learning disabilities, and behavioural challenges, providing individual and group therapy using evidence-based approaches such as CBT and DBT. Dr. Winslow has developed and implemented personalised treatment plans, conducted formal and informal assessments, and delivered crisis intervention for clients in need of urgent mental health care. Her expertise spans assessment, treatment planning, and behavioural intervention for both neurodevelopmental and mental health conditions.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy.

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.