Preretinal<unk>  retinopathy is pathological syndrome associated with the<unk> . It presents as preretinal hemorrhage (bleeding in front of the retina) in people with a history of transient increase in the intrathoracic pressure and may be associated with heavy lifting, forceful coughing, straining on the toilet, or vomiting. The bleeding may cause visual loss if it obstructs the visual axis, and patients may note floaters in their visual field. Usually this causes no permanent visual impairments, and sight is fully restored. Cardiovascular and gastroinestinal Cardiac arrest and other cardiovascular complications can occur due to attempting to induce defecation using the<unk> . Another complication of the practice is hiatal hernia.
Valsalva maneuver
Phalen maneuver
Rubin maneuver
Epley maneuver
Wright's maneuver
LeCompte maneuver
Jaw-thrust maneuver
Zavanelli maneuver