A 56-year-old male was admitted to our center with an abnormal finding on low dose screening chest CT scan which demonstrated an atelectasis and abrupt narrowing in the right upper lobar bronchus (Fig. 1A). Bronchoscopic biopsy revealed a squamous cell carcinoma obstructing the right upper bronchus and [¹⁸F]fluorodeoxyglucose positron emission tomography demonstrated hypermetabolism in the bronchus and right lower paratracheal lymph node. Clinical staging was cT1aN2M0. The patient was scheduled for curative resection of the lung cancer. He had a past medical history of hypertension and unstable angina, which had been treated by plain balloon angioplasty 8 years previously. He was taking aspirin 100 mg daily, diltiazem 90 mg daily, isosorbide mononitrate 20 mg twice daily, and candesartan 16 mg daily, but still complained of intermittent chest pain on exertion (CCS class II). A myocardial perfusion scan showed reversible perfusion defects in the apex and the apical anterior wall suggesting left anterior descending artery (LAD) territory ischemia. Echocardiography showed basal inferior wall akinesia and basal inferolateral wall hypokinesia with a normal left ventricular ejection fraction (EF). The patient was treated with aspirin 300 mg and clopidogrel 600 mg in preparation for coronary angiography (CAG). CAG revealed 3-vessel disease with an nearly occluded proximal LAD, 75% stenosis in the proximal left circumflex artery (LCX) and diffuse 50% stenosis in the right coronary artery (RCA) (Fig. 1B). We decided to revascularize the critical ischemia before surgery. We performed PCI for the proximal LAD and the proximal LCX using BMSs (Coroflex Blue®, B. Braun Corporation, Melsungen, Germany; 3.0×19 mm and 2.75×13 mm in LAD and Driver®, Medtronic Cardiovascular, Minneapolis, MN, USA; 3.0×30 mm in LCX) (Fig. 1C). Twenty minutes after completion of the procedure, the patient developed an urticarial rash on his trunk, diaphoresis, chest pain, hypotension, and bradycardia. Radio-contrast induced anaphylactic shock was suspected. Despite medical therapy, the symptoms persisted and an electrocardiogram (ECG) showed ST-segment elevations in V 4, V 5, and V 6 (Fig. 1D). Emergent angiography with support of an intra-aortic balloon pumping demonstrated thrombotic total occlusion of the LCX stent and some thrombi in LAD stent (Fig. 1E). The stent was reopened with aspiration thrombectomy and additional ballooning, accompanied by intravenous abciximab infusion. The patient made a good recovery and was asymptomatic when discharged with aspirin 100 mg and clopidogrel 75 mg daily. He returned within the month for neo-adjuvant chemotherapy and video assisted thoracic surgery. Fifteen days later, he was re-admitted for neo-adjuvant chemotherapy (paclitaxel+carboplatin). After 10 minutes of paclitaxel infusion, he developed diaphoresis, dyspnea and chest pain with hypotension. An ECG showed ST-segment elevation of about 4 mm in V 2-V 4. Emergent angiography demonstrated intraluminal thrombi in the LAD and LCX stents (Fig. 1F). Abciximab was administered and aspiration thrombectomy and balloon angioplasty were performed, resulting in restoration of Thrombolysis in Myocardial Infarction grade 3 flow. The patient again showed a good recovery and was asymptomatic when discharged with triple anti-platelet therapy due to the recurrent episode of stent thrombosis (aspirin 100 mg and clopidogrel 75 mg daily, cilostazol 100 mg twice daily). At 42 days post-PCI, the patient underwent right upper lobectomy without any further adverse events. He is now doing well with aspirin 100 mg daily.

A 68-year-old male presented with a three-day history of fever and abdominal pain. His past medical history included hypertension and 3-vessel coronary artery disease, which had been treated by PCI 13 years previously. The medical record of the PCI was unavailable. The patient had been taking aspirin 100 mg daily along with an angiotensin converting enzyme inhibitor and a beta-blocker since the PCI. A CT scan of the abdomen revealed a pericolic abscess with pneumoretroperitoneum at the right perirenal space and a pancreatic tail mass invading into the left kidney (Fig. 2A), the spleen, and the descending colon. An acute perforated appendicitis or diverticulitis was suspected and the patient underwent emergent laparotomy. Surgical findings included an intra-abdominal abscess with severe adhesions and multiple seeding nodules on the rectal shelf and the omentum. Pathology confirmed metastatic adenocarcinoma originating from the pancreas. At postoperative day 22, despite resolution of the intra-abdominal infection, the patient developed pulmonary edema with respiratory failure and shock requiring mechanical ventilation. His ECG showed no change but cardiac enzymes were elevated (peak troponin I was 0.219 ng/mL). Echocardiography showed regional wall motion abnormality in the RCA territory and left ventricular dysfunction (EF 42%). Cardiogenic shock due to myocardial ischemia was suspected. CAG revealed a near total occlusion in the proximal LAD (Fig. 2B) and a 90% stenosis of the posterolateral branch. A 3.5×23 mm Genous™ stent (OrbusNeich, Hong Kong) was deployed in the proximal LAD (Fig. 2C) and a 2.75×18 mm Xience stent (Abbot Vascular, Abbot Laboratories, Abbot park, IL, USA) was inserted in the posterolateral branch.

Twenty minutes after PCI, the patient developed ventricular fibrillation with pulseless ventricular tachycardia (Fig. 2D), which was initially unresponsive to electrical cardioversion and anti-arrhythmic drugs. We instituted extracorporeal membrane oxygenation (ECMO) and on repeat angiography we discovered a total occlusion of the proximal LAD stent with an extensive thrombus (Fig. 2E). Abciximab was administered intravenously, and aspiration thrombectomy with additional ballooning was performed. The patient had also developed a new thrombus in the distal RCA that had not been seen during the previous angiography (Fig. 2F). A 3.0×23 mm Xience stent was placed in the distal RCA lesion because there was significant residual stenosis after plain balloon angioplasty. Once the total occlusion of the proximal LAD was reopened, the patient's ventricular tachycardia was converted to sinus rhythm. Four days later, he was weaned from ECMO support and started showing gradual recovery from pulmonary edema and cardiogenic shock. Nonetheless, the patient died from the progression of his cancer in forty days.