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Mediastinal effusion due to pericardiocentesis with cardiac tamponade: a case report

Abstract

Background

Pericardiocentesis is an effective treatment for cardiac tamponade, but there are risks, including haemorrhagic events, cardiac perforation, pneumothorax, arrhythmia, acute pulmonary oedema and so on. Mediastinal effusion caused by puncture is rarely reported.

Case presentation

A 47-year-old man who had a history of right leg deep vein thrombosis and pulmonary artery embolism with implantation of an inferior vena cava filter presented for inferior vena cava filter removal. Within 30 min after the procedure, he developed chest pain, nausea, vomiting and presyncope with shock. Echocardiography confirmed massive pericardial effusion with evidence of cardiac tamponade. Emergency pericardiocentesis was performed. Confusingly, only 3 mL of bloody pericardial effusion was drained in total, and subsequently, the patient’s symptoms rapidly improved with stable haemodynamics. Repeat echocardiography showed that the pericardial effusion had disappeared. Urgent computed tomography pulmonary angiography demonstrated localized effusion, which was not seen the previous computed tomography results and was noted around the left ventricle in the mediastinal apace. No intervention was performed, given that there was no bleeding tendency or further adverse events related to the mediastinal effusion. The patient was subsequently discharged in a stable condition a few days later, and outpatient follow-up was advised.

Conclusions

Mediastinal effusion is a rare complication of pericardiocentesis. In the case described herein, the most likely cause was pericardial effusion extravasated into the mediastinum through the needle insertion site in the puncture process due to large pressure variations in the intrapericardial space with tamponade, differing from cases of over-anticoagulation reported in the previous literature. Just as our case demonstrates that conservative treatment of an hemodynamic insignificant mediastinal effusion may be appropriate. Echocardiography is useful and effective to minimize complication rates.

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Background

Cardiac tamponade is a critical condition that requires immediate intervention. [1] Pericardiocentesis is an effective but risky management approach, sometimes leading to serious procedure-related complications, such as cardiac puncture, pneumothorax, arrhythmia and acute pulmonary oedema. [2] However, among the reported complications, mediastinal effusion is very rare. We present a case of a patient who experienced mediastinal effusion due to pericardiocentesis with cardiac tamponade following inferior vena cava filter removal.

Case presentation

A 47-year-old man presented for inferior vena cava (IVC) filter removal, which was initially placed roughly one month prior to this hospitalization. He had a 10 pack-year history of smoking and was diagnosed with thromboangiitis obliterans for more than six months. At that time, the patient had right leg deep vein thrombosis (DVT) and bilateral segmental pulmonary embolism (PE). A nonpermanent IVC filter was placed to prevent recurrence of PE from DVT, and the DVT was treated with mechanical thrombectomy. Subsequently, the patient received long-term anticoagulation with rivaroxaban. In the present hospitalization, computed tomography pulmonary angiography (CTPA) showed that the bilateral segmental pulmonary thrombus had almost disappeared, and ultrasonography showed partial thrombus dissolution and patency of blood flow in the vein of the right lower limb. Based on the above results, it was not necessary to retain the filter. Then, interventional radiology-guided IVC filter removal was performed in the operating room. Under X-ray fluoroscopy, a snare was inserted into the right internal jugular vein, and the IVC filter was withdrawn from its hook. The procedure was uneventful. Within 30 min after the procedure, the patient developed chest pain, nausea, vomiting and presyncope. Physical examination showed a blood pressure of 70/34 mmHg, a pulse of 108 beats per minute, and a respiratory rate of 23 breaths per minute. Arterial blood gas showed a pH of 7.31, PaCO2 of 36 mmHg, PaO2 of 68 mmHg, HCO3 of 18.1 mmol/L, lactate 5.8 mmol/L and oxygen saturation of 95 %. Bedside echocardiography confirmed circumferential pericardial effusion, 1.59 cm in the largest dimension, with evidence of cardiac tamponade (Fig. 1, videos in supplementary files 1 and 2). The ideal puncture site, as defined by echocardiography, was para-apical. Pericardiocentesis was immediately performed with an 18G (1.3 × 1.06 × 65) mm needle after echocardiography localization. Confusingly, only 3 mL of bloody pericardial effusion was removed in total, and subsequently, the patient’s symptoms significantly improved except for mild subxiphoid pain. His vital signs improved approximately 3 min later, with a blood pressure of 125/95 mmHg, a pulse of 70 beats per minute, a respiratory rate of 20 breaths per minute, and an oxygen saturation of 99 %. Clotting tests indicated an INR of 1.15, an activated partial thromboplastin time of 34.7 s, and a prothrombin time of 14.5 s. Repeat echocardiography revealed that the pericardial effusion had disappeared (Fig. 1d, video in supplementary file 3). To clear up the confusion, an urgent CTPA was performed approximately 3 h after the procedure. The images showed mediastinal effusion, which had not been seen on the previous CTPA (Fig. 2a), around the left ventricle in the anterior mediastinum (Fig. 2b). Considering that the patient was asymptomatic and organ failure secondary to mediastinal effusion were not present, no intervention was suggested. He remained in the hospital for three days after the procedure. He was subsequently discharged in a stable condition, and outpatient follow-up was advised.

Fig. 1
figure1

Echocardiography with a four-chamber view and a parasternal long axis. Circumferential pericardial effusion (*) (Panel a) was 1.59 cm in the largest dimension (Panel b). Sign of cardiac tamponade (Panel c): diastolic collapse of the right ventricle with pericardial effusion (white arrow). The pericardial effusion disappeared after the pericardiocentesis (Panel d)

Fig. 2
figure2

Computed tomography pulmonary angiography

No mediastinal effusion occurred before the pericardiocentesis (Panel a). The white arrow shows the mediastinal effusion after the pericardiocentesis (Panel b)

Discussion and conclusions

The indication for IVC filter implantation is still debatable. Societal guidelines vary in the indications. [3,4,5] The most widely accepted one is the prevention of PE in a patient with DVT who cannot receive anticoagulation. Other accepted indications for IVC filter implantation include a complication of anticoagulation, thrombus progression despite adequate anticoagulation, high-risk or massive PE, and free-floating thrombosis or large acute thrombosis in iliac, femoral vein or inferior vena cava. In our case, the patient had large acute right leg DVT and bilateral segmental PE. A IVC-filter was indicated to intercept thrombus that had broken free from lower limb DVT during mechanical thrombectomy and prevent its migration to the lungs. In current practice, the retrievable filters are placed much more commonly than the permanent filters. The retrievable IVC filter should be removed once placement indications are no longer present.

IVC filter removal can lead to various complications, including IVC perforation, air embolism, pneumothorax or filter migration. However, as this case and a literature review illustrates, cardiac tamponade is a rare but life-threatening complication of IVC filter removal. The likely mechanism is myocardial rupture, as presented in a previous case report. [6] In our case, although there was no definitive evidence of myocardial rupture, we thought that this might have occurred due to the possible puncture of the inferior vena cava surrounded with pericardium or right atrium by the guidewire or filter during the manipulation of the vasculature.

Echocardiography should be obtained immediately if cardiac tamponade is suspected. [7] A common sign of cardiac tamponade with significant haemodynamic compromise is collapse of the right atrium and the right ventricle. This occurs during the diastolic phase, when the intrachamber pressures are lower than the intrapericardial pressures. [8, 9] Acute tamponade generally occurs within minutes and requires urgent pericardiocentesis. Pericardiocentesis has potential risks, with major procedural complications including haemorrhagic events, cardiac perforation, pneumothorax, and arrhythmia. [10] In our case, at least 100 ml of fluid accumulated in the pericardial cavity according to the echocardiographic images; however, only 3 ml was aspirated, and the symptoms and vital signs of cardiac tamponade improved rapidly after a few minutes. These findings suggest that the tamponade had been relieved, as shown by repeat echocardiography. “Where did the effusion go?” was the question about which we were confused. Approximately 3 h after the procedure, a repeat CT scan revealed fluid accumulation in the mediastinal space.

However, mediastinal effusion due to this procedure is very uncommon. We conducted a thorough search of the literature published to date with the search terms ‘pericardiocentesis’ and ‘Mediastinal effusion or Mediastinal hematoma’ on PubMed. There are no similar published cases. In a series of 161 patients with cardiac tamponade, Maggiolini et al. [2] reported one patient whose clotting tests indicated overanticoagulation with warfarin who developed this complication within 2 days after pericardiocentesis, requiring thoracic surgery. However, this is different from our case, where our patient had no bleeding tendencies. In our case, the most likely cause was that the pericardial effusion moved into the mediastinum through the needle insertion site due to the changes in the intrapericardial pressure in response to the tamponade. When the intrapericardial pressure increases excessively due to cardiac tamponade, a bloody effusion may rapidly flow from the pericardium to the surrounding low-pressure mediastinum during the pericardiocentesis process, which led to the accumulation of an effusion in the mediastinal space.

Pericardial tamponade is an uncommon complication of IVC filter removal and is an absolute indication for pericardiocentesis. It is rare, but pericardial effusion may extravasate into the mediastinum during the procedure due to large pressure variations in the intrapericardial space, increasing the risk of cardiac perforation. Just as our case demonstrates that conservative treatment of an hemodynamic insignificant mediastinal fluid collection may be appropriate. Echocardiography is useful before, during and after the procedure to reduce the incidence of procedural complications. [2].

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Abbreviations

IVC:

Inferior vena cava

DVT:

Deep vein thrombosis

PE:

Pulmonary embolism

CTPA:

Computed tomography pulmonary angiography 

Fig:

Figure

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Q.Z. wrote this paper. Y.L. and D.W. reviewed and edited the manuscript. All authors read and approved the final manuscript.

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Correspondence to Ying Liu.

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Supplementary Information

Additional file 1:

Apical 4-chamber dynamic imaging to assess the pericardial effusion.

Additional file 2:

Parasternal long axis dynamic imaging of the cardiac tamponade.

Additional file 3:

Parasternal long axis dynamic imaging after the cardiac tamponade was resolved.

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Zhang, Q., Wang, D. & Liu, Y. Mediastinal effusion due to pericardiocentesis with cardiac tamponade: a case report. BMC Anesthesiol 21, 172 (2021). https://doi.org/10.1186/s12871-021-01385-8

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Keywords

  • Mediastinal effusion
  • Pericardiocentesis
  • Cardiac tamponade
  • Pericardial effusion
  • Inferior vena cava filter.