=Aortic Stenosis.=—_Definition._—Aortic stenosis is an obstruction of the aortic orifice, due to changes in the segments of the semilunar valves, or arterio-sclerosis, or atheromatous deposits. _Treatment._—Give same treatment advised for aortic incompetency, with special care in the injection. Sclerotic conditions may complicate the injection, and in that case as many arteries should be injected as possible together with full blood drainage. =Mitral Incompetency.=—_Synonyms._—Mitral Regurgitation; Mitral Insufficiency. _Definition._—This condition is an incomplete or imperfect closure of the auriculo-ventricular opening, permitting the regurgitation of blood during the contraction of the left ventricle, and due to an abnormal condition of the leaflets or an enlarged opening. _Treatment._—Give same treatment as advised for aortic incompetency, with special care to remove as much blood as possible, which, with massaging the face downward, should relieve any blood discolorations. =Mitral Stenosis.=—_Definition._—Mitral stenosis is a constriction of the left auriculo-ventricular orifice, usually due to valvular endocarditis. _Treatment._—Give this body the same treatment as advised for aortic incompetency, with special care indicated in mitral incompetency. =Tricuspid Incompetency.=—_Synonym._—Tricuspid Regurgitation. _Definition._—This condition is an imperfect closure of the tricuspid valves, due to dilation of the right ventricle or to disease of the valves. _Treatment._—Drain as much blood as possible from this case. Massage the face downward, and inject the maximum amount of fluid; diluting the first bottle to half strength. In obstinate cases of blood discoloration, open the common carotid arteries and internal jugular veins, inject upward in the arteries and drain from the veins, so as to wash out the vessels of the face. For facial injection use nothing stronger than half strength fluid. Give thorough cavity injection. For transportation, govern yourself according to the provisions of the transportation rules. =Tricuspid Stenosis.=—_Definition._—Tricuspid stenosis is an obstruction of the tricuspid opening, usually congenital, though it may be acquired. _Treatment._—Treat the same as for tricuspid incompetency. =Pulmonary Incompetency.=—_Synonym._—Pulmonary Insufficiency. _Definition._—Pulmonary incompetency is an imperfect closure of the pulmonary orifice of the right ventricle due to changes in the pulmonary valves. _Treatment._—Treat the same as for tricuspid incompetency. =Pulmonary Stenosis.=—_Definition._—Pulmonary stenosis is an obstruction of the pulmonary opening of the right ventricle, due to congenital defects or to endocarditis. _Treatment._—Treat the same as for tricuspid incompetency. =Cardiac Thrombosis.=—_Definition._—Cardiac thrombosis is the formation of blood clots in the cavities of the heart.