<prompt> Cardiac tamponade causes pulsus:AlternansBigeminiParadoxusParvus  <response>: Ans: c Paradoxus Ref: Harrisons, 16th ed, p. 1416; 17th ed, p. 1491Clinical signs in cardiac tamponade - pulsus paradoxus, prominent x descent in JVPECG changes - low ECG voltage, electrical alternans. RVDC feature in echoNotesFreidrichs sign - Rapid fall steep Y descent and rise of JVP seen in constrictive pericarditis and tricuspid regurgitation. 