A 45-year-old Caucasian woman with recently diagnosed acute myelogenous leukemia was admitted to hospital with complaints of right lower extremity swelling and progressively worsening dyspnea. Her past history included Hodgkin's lymphoma (in remission). Doppler ultrasound of her lower extremities ruled out deep venous thrombosis. On day 3 of hospitalization, the patient complained of shortness of breath at rest and cough. On physical examination, she had engorged jugular veins, tachycardia and a pulsus paradoxus of 20 mmHg. An electrocardiogram (ECG) demonstrated sinus tachycardia, low voltage and electrical alternans. The chest x-ray was unremarkable except for small bilateral pleural effusions. Emergent transthoracic echocardiography (TTE) showed normal left ventricular (LV) wall motion and an ejection fraction of 60% to 65%. Moderate circumferential pericardial effusion with compression of the right heart chambers and echocardiographic evidence of tamponade was noted.Echocardiography-and fluoroscopy-guided pericardiocentesis was performed for incipient tamponade, and approximately 500 mL of serosanguinous fluid was drained. A pigtail catheter was left in place.Cytological evaluation did not demonstrate any malignant cells.Six hours following the pericardiocentesis, the patient became hypotensive, tachypneic and tachycardic, requiring endotracheal intubation and inotropic support. A repeat TTE showed midanterior and anteroseptal akinesis, apical sparing and moderate LV dysfunction with an estimated ejection fraction of 30%. Minimal residual pericardial fluid was observed. A 12-lead ECG showed sinus tachycardia without ST-T changes. Chest x-ray showed pulmonary edema. Cardiac biomarkers, including troponin I, demonstrated minimally elevated values, with a peak value of 1.2 μg/mL (normal peak: 0.40 μg/mL). Cardiac magnetic resonance imaging (CMR) was performed to assess for myocarditis and myonecrosis. No evidence of delayed enhancement following gadolinium contrast was identified (Figure 1). The patient remained in cardiogenic shock for approximately 72 h, requiring ventilatory and inotropic support. Serial TTE showed progressive improvement in systolic function, and the patient was weaned off inotropic and CASE REPORT ©2007 Pulsus Group Inc. All rights reserved JM Bernal, L Afonso, J Pradhan, T Li. Acute pulmonary edema following pericardiocentesis for cardiac tamponade. Can J Cardiol 2007;23(14):1155-1156.Pericardiocentesis for therapeutic drainage of pericardial fluid may be associated with a variety of complications, including laceration of the right ventricle or coronary artery, arrhythmias, viscus perforation, hypotension, pneumothorax, adult respiratory distress syndrome and death. Hemodynamic derangements such as acute left ventricular failure, pulmonary edema and cardiogenic shock are infrequent and, hence, less well recognized. The present report describes a patient with pericardial effusion and tamponade who developed cardiogenic shock requiring inotropic support shortly following uncomplicated ultr...