Introduction

Left ventricle (LV) pseudoaneurysm is described as a contained sac of the myocardium, which usually develops due to acute transmural myocardial infarction (1). Although most patients with LV pseudoaneurysm present with chest pain or dyspnea or signs and symptoms of congestive heart failure or peripheral embolism, a sizable portion of such cases might be diagnosed without typical symptoms (2). In this case, we reported a LV pseudoaneurysm in an adult patient without specific symptoms.

Case Report

A 60-year-old male patient presented to outpatient clinic with symptom of fatigue. The patient had a history of coronary artery stenting due to acute myocardial infarction two years ago. Electrocardiography demonstrated a normal sinus rhythm, pathological Q wave in III and AVF leads without ST elevation, and T wave negativity in I and AVL leads (Figure 1A). Posteroanterior chest scan did not reveal any remarkable finding (Figure 1B). He underwent a computed tomography (CT) scan of the chest due to the suspicion of Coronavirus-2019 disease. On CT, it was found that there was a huge mass on the lateral side of the LV with a diameter of 5x4 cm (Figure 2A). To clarify the diagnosis, cardiac magnetic resonance imaging was performed providing the presence of huge pseudoaneurysm fulfilled with thrombus on the posterolateral side of the LV (Figure 2B). Transthoracic echocardiographic examination showed a LV ejection fraction of 40% and pseudoaneurysm of posterior wall but the quality of image was poor. The cardiac operation, including the resection of huge pseudoaneurysm, was planned due to the risk of peripheral embolism. The coronary angiography before cardiac surgery revealed a total occlusion of the circumflex artery after obtuse marginal artery-2 (Figure 3A). The aneurysm was diagnosed as a pseudoaneurysm because there was a discontinuation, which suggests a rupture in the wall. The most lateral wall of the aneurysm could not be imaged because of technical difficulties (Figure 3B). During cardiac operation, it was noted that pseudoaneurysm was completely fulfilled with thrombus (Figure 4A). The pseudoaneurysm was resected and huge thrombus was retrieved in a single piece (Figure 4B).

Discussion

LV pseudoaneurysm, which usually develops following cardiac rupture due to transmural myocardial infarction, has a small, akinetic wall consisting of mainly two layers of pericardium and fibrous tissue that is contrast to true aneurysms composed of three layers, including endocardium, myocardium, and pericardium (1,3). In our case, there was a discontinuity in the posterior wall and the wall of the aneurysm was very thin, suggesting pericardium instead of myocardial layers. The LV pseudoaneurysms have high risk of mortality because of a significant risk of sudden rupture. However, in this case, the thrombus might have prevented rupture of the wall of the pseudoaneurysm. In contrast to our case who presented without typical symptoms, most patients with LV pseudoaneurysm usually present with the signs and symptoms of heart failure, peripheral embolism, life threating arrhythmias, and chest pain (3). Therefore, the clinicians should be aware of atypical presentation in some patients with LV pseudoaneurysm. As shown in our case, in patients who presented with huge LV pseudoaneurysm fulfilled with thrombus should undergo a cardiac surgery, including the resection of pseudoaneurysm and retraction of thrombus, due to the risk of peripheral embolism (4).

Ethics

Informed Consent: Informed consent was obtained from the patient for publishing this case report.

Peer-review: Internally peer-reviewed.

Authorship Contributions

Concept: S.D., T.Ç., Design: S.D., T.Ç., M.K., İ.A., M.U., Data Collection or Processing: S.D., T.Ç., M.K., İ.A., M.U., Analysis or Interpretation: S.D., T.Ç., M.U., Literature Search: M.K., İ.A., Writing: S.D., T.Ç., M.U.

Conflict of Interest: No conflict of interest was declared by the authors.

Financial Disclosure: The authors declared that this study received no financial support.