Radiculopathy is a condition caused by irritation or compression of a spinal nerve root. It commonly produces pain, numbness, tingling, or weakness that travels into an arm or a leg. The term is used in spine clinics, imaging reports, physical therapy notes, and surgical planning. It helps clinicians describe a pattern of symptoms that follows a specific nerve pathway.

Patent Ductus Arteriosus is a congenital (present at birth) heart-related blood vessel connection that stays open when it should close. It involves the ductus arteriosus, a normal fetal vessel between the pulmonary artery and the aorta. After birth, this vessel usually closes on its own, but in Patent Ductus Arteriosus it remains open (“patent”). It is commonly discussed in neonatal care, pediatric cardiology, and adult congenital heart disease clinics.

Mechanical back pain is back pain primarily related to the way the spine’s structures move and bear load. It is commonly used as a clinical description for pain coming from muscles, joints, discs, or ligaments. It often changes with posture or activity, such as bending, lifting, sitting, or standing. The term is used in primary care, sports medicine, physiatry, pain medicine, and spine surgery discussions.

VSD stands for **ventricular septal defect**. It is an opening in the **ventricular septum**, the wall between the heart’s two lower chambers (ventricles). VSD is most commonly discussed in **congenital heart disease** (present at birth), but it can also be acquired later in life. Clinicians use the term VSD in cardiology to describe the defect’s **location, size, blood-flow effects, and treatment options**.

Axial back pain means pain that is mainly felt in the spine itself. It is commonly described as “back pain without sciatica” or “neck pain without arm pain,” although symptoms can overlap. Clinicians use the term to separate spine-centered pain from nerve-root pain that travels into an arm or leg. It is used in primary care, physical therapy, and spine specialty clinics as a classification for evaluation and documentation.

A Ventricular Septal Defect is a hole in the wall (septum) between the heart’s two lower chambers (the ventricles). It can be present at birth (congenital) or occur later in life (acquired). It may allow blood to flow from the left ventricle to the right ventricle, changing normal circulation. The term is commonly used in cardiology, pediatric cardiology, and cardiothoracic surgery when evaluating heart murmurs, shortness of breath, or heart structure.

Mid-back pain is discomfort felt in the upper-to-middle portion of the back, most often in the thoracic spine region. It is a symptom label, not a single diagnosis, and it can reflect muscle, joint, disc, nerve, or non-spine causes. The term is commonly used in primary care, physical therapy, sports medicine, and spine clinics to describe where pain is located. It helps clinicians organize an evaluation and decide what conditions to consider next.

Neck pain is discomfort or pain felt in the neck region, between the base of the skull and the top of the shoulders. Neck pain is a symptom, not a single diagnosis. Neck pain is commonly used in clinic notes, imaging reports, and physical therapy documentation. Neck pain can occur alone or alongside arm symptoms, headaches, or balance changes.

ASD most commonly refers to an **atrial septal defect**, a hole in the wall (septum) between the heart’s two upper chambers (atria). It is usually a **congenital** condition, meaning it is present at birth. ASD is commonly discussed in cardiology when evaluating heart murmurs, shortness of breath, exercise tolerance, and right-sided heart enlargement. Clinicians also use the term when planning imaging follow-up or considering defect closure in selected cases.

Low back pain is pain felt in the lower part of the back, typically between the bottom of the ribs and the buttocks. It is a symptom, not a single diagnosis. The term is commonly used in primary care, emergency care, physical therapy, and spine specialty clinics. It is also used in medical records, billing codes, research studies, and clinical guidelines.