45. Smallest blood vessel
46. Instrument to measure blood pressure
47. Incision of a vein
48. Condition of deficient oxygen
49. Largest vein in the body
50. Pacemaker of the heart
51. Largest artery in the body
52. High levels of a fatty substance in the blood
53. Wall between the upper chambers of the heart
54. Widening of a blood vessel
55. Vessel carrying blood to the arm
56. Removal of fatty plaque (from a blood vessel)
57. New connection between two arteries
58. Inflammation of valve on the left side of the heart
59. Breakdown (destruction) of a blood clot
60. Vessel carrying blood to the lungs
61. Surgical repair of a valve
62. Hardening of arteries
63. Enlargement of the heart
64. Surgical puncture to remove fluid between the membranes surrounding the heart