• Arterialisation

    Arterial flow in the venous system.

  • Arteriosclerosis

    Calcification of the arteries. Narrowing of the blood vessels caused by deposits such as calcium, blood fats or clots.

  • Arteriovenous fistula

    Abnormal connection between an artery and a vein. This bypass redirects blood from the artery directly into the vein.

  • Artery

    Blood vessel that transports blood away from the heart. Arteries generally transport blood enriched with oxygen.

  • Arthrodesis

    Surgical stiffening or fusing of a joint.

  • Arthroscopic technique

    Examination of and/or surgery on joints using a special tubular instrument (endoscope).

  • Ascending aorta

    Part of the aorta ascending from the heart.

  • Ascites

    Accumulation of fluid in the abdomen.

  • Asepsis

    Free from pathogenic microorganisms (sterile).

  • Astrocytoma

    Brain tumour.

  • Atrial ablation

    Placement of a heat-generating electrode-tipped catheter in the left and right atrium to restore the even spread of electrical signals throughout the heart.