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Aims Takotsubo syndrome (TTS) is an acute cardiac condition characterized by a temporary wall motion abnormality of the left ventricle that mimics an acute coronary syndrome (ACS). TTS usually occurs following emotionally or physically triggering event. We report a rare case of Takotsubo syndrome following a pacemaker implantation. Methods and results A 77-year-old woman was admitted to our hospital with a third-degree atrioventricular block. She was asymptomatic with a history of hypertension, diabetes, hyperlipidaemia and extrapyramidal syndrome. Laboratory tests reported High-Sensitive cardiac Troponin T (HS-cTnT) 32.9 ng/L (ULN &amp;lt;14), creatine kinase muscle and brain (CK-MB) 4.1 ng/mL (ULN &amp;lt; 4.94) and NT-proB-type Natriuretic Peptide (NT-proBNP) 1465 pg/ml (ULN &amp;lt; 125). Echocardiography showed a normal left ventricular ejection fraction (EF = 58%) (Figure 2A). The patient underwent dual chamber pacemaker implantation without immediate complications. Three days later, a routine ECG showed new T wave inversions (Figure 1), in absence of symptoms. Echocardiography revealed apical akinesia, with ‘apical ballooning’ (EF 30%) (Figure 2B). Serum cardiac markers were increased (CK-MB 8.2 ng/ml, HS-cTnT 189.7 pg/ml, NT-proBNP 15 005 pg/ml. A coronary angiography excluded obstructive coronary artery disease (Figure 3). Given the impossibility of carrying out a cardiac RMI for the recent pacemaker implantation and after exclusion of other diagnoses, pacemaker implantation induced Takotsubo syndrome was suspected. Conclusions The trigger of this case of TTS was the pacemaker implantation, a relatively brief and painless procedure that, in her case could have constitute a considerable emotional and physical stress. To the best of our knowledge 13 cases of TTS after pacemaker implantation have been described to date. Of those cases, four had an asymptomatic course. Therefore, the real incidence of TTS following pacemaker implantation may be underestimated and ECG and echocardiography should always be performed after pacemaker implantation.

711 A rare case of takotsubo syndrome induced by pacemaker implantation