Deathwatch beetle. Deathwatch beetle (Xestobium rufovillosum), an anobiid, or borer insect, of the family Anobiidae (insect order Coleoptera) that makes a ticking or clicking sound by bumping its head or jaws against the sides of the tunnels as it bores in old furniture and wood.
1 Superior vena cava syndrome is most often caused by compression of the vein (the superior vena cava), that returns blood from the upper body back to the right atrium of the heart by tumor.  Symptoms include swelling of the face and arms associated with shortness of breath.
Aortic stenosis â Aortic stenosis usually does not cause symptoms until the valve opening narrows to about one-third of normal. Symptoms include shortness of breath during exertion (exertional dyspnea), heart-related chest pain (angina pectoris) and fainting spells (syncope).