All are features, seen in cardiac tamponade ,EXCEPT-

Rapid Y descent seen in cardiac tamponade Cardiac tamponade, also known as pericardial tamponade, is when fluid in the pericardium (the sac around the hea) builds up, resulting in c of the hea. Onset may be rapid or gradual.Symptoms typically include those of cardiogenic shock including shoness of breath, weakness, lightheadedness, and cough. Other symptoms may relate to the underlying cause A very large pericardial effusion resulting in tamponade as a result of bleeding from cancer as seen on ultrasound. Closed arrow - the hea; open arrow - the effusion Common causes of cardiac tamponade include cancer, kidney failure, chest trauma, and pericarditis. Other causes include connective tissues diseases, hypothyroidism, aoic rupture, and complications of cardiac surgery. In Africa, tuberculosis is a relatively common cause. Diagnosis may be suspected based on low blood pressure, jugular venous distension, pericardial rub, or quiet hea sounds. The diagnosis may be fuher suppoed by specific electrocardiogram (ECG) changes, chest X-ray, or an ultrasound of the hea.If fluid increases slowly the pericardial sac can expand to contain more than 2 liters; however, if the increase is rapid as little as 200 mL can result in tamponade Ref Harrison 20th edition pg 1523