Left atrial compression syndrome secondary to coronary artery perforation: Pathophysiology, diagnosis, and management strategies.

Coronary perforation (CP) poses a significant risk of morbidity and mortality, particularly, in patients with a history of cardiac surgery. The occurrence of loculated pericardial effusion presents distinctive challenges in these postcardiac surgical patients. This study delves into the complexities arising from the formation of loculated pericardial effusions subsequent to CP, with a specific focus on the loculated effusion in the posterior wall leading to left atrial compression syndrome. This analysis is dedicated to elucidating pathophysiology diagnostic and treatment strategies tailored for addressing left atrium compression syndrome, providing invaluable insights into the intricacies of diagnosing, treating, and managing this entity in the postcardiac surgical patient.

Late coronary artery injury following chemoradiotherapy for thymic carcinoma: a case report.

INTRODUCTION: Surgery remains the primary treatment modality for thymic carcinoma, with adjuvant radiotherapy being recommended to effectively mitigate local recurrence and metastasis rates subsequent to incomplete or complete resection. Chemoradiotherapy has the potential to induce coronary artery occlusion, thereby potentially impacting patients' long-term survival rates. The existing literature currently lacks comprehensive research on the lesion characteristics of coronary artery injury resulting from chemoradiotherapy. CASE PRESENTATION: The male patient, aged 55, was admitted to the hospital due to recurrent chest tightness and pain persisting for one week. Notably, the patient had previously undergone curative resection surgery for thymic carcinoma seven years ago. After the surgical procedure, the patient underwent a course of adjuvant chemotherapy comprising docetaxel and platinum. 11 months later, imaging examination diagnosed tumor recurrence, and concurrent chemoradiotherapy was administered at a total dose of 62 Gy/31F for planning gross target volume (PGTV) and 54 Gy/31F for planning target volume (PTV) with 2 cycles of paclitaxel and cisplatin. Re-admission of the patient occurred after a 7-year interval subsequent to the completion of concurrent chemoradiotherapy, leading to a subsequent diagnosis of acute non-ST segment elevation myocardial infarction. Following administration of antiplatelet, anticoagulant, and anti-myocardial ischemia therapy, coronary angiography revealed the presence of a bifurcation lesion at the distal end of the left main trunk. Intravascular ultrasound (IVUS) examination demonstrated significant negative remodeling of both the main trunk and its branches at the bifurcation site, characterized by minimal atherosclerotic plaque components. CONCLUSIONS: Chemoradiotherapy may induce damage to endothelial cells, resulting in an inflammatory response. Negative remodeling of blood vessels is likely to occur, primarily characterized by vasoconstriction but with less atherosclerotic plaque burden. Routine stent implantation in negatively remodeled areas may lead to vascular rupture, necessitating intravascular imaging examination.

A Case of Coronary Artery Perforation Caused by Manual Cardiopulmonary Resuscitation in the Catheterization Laboratory.

Cardiopulmonary resuscitation (CPR) is essential for the survival of cardiac arrest patients, but it can cause severe traumatic complications. In the catheterization laboratory, various physical constraints complicate the appropriate performance of CPR. However, we are not aware of reports of CPR complications in this setting. Here, we report a case of coronary artery perforation (CAP) caused by manual CPR in the catheterization laboratory. The patient, a 68-year-old woman, initially underwent successful percutaneous coronary intervention (PCI) for unstable angina. Back in the ward, the patient experienced acute stent thrombosis, which resulted in cardiac arrest, and another PCI was performed under ongoing manual CPR. Although revascularization was successful, sudden CAP occurred, leading to cardiac tamponade. Despite extensive treatment efforts, the patient died 18 hours later.Initially, the compression site of CPR was on the midline of the sternum; however, the compression site shifted to the left, to just above the left anterior descending artery, by the time that CAP was detected via angiography. This corresponded to the area where rib fractures were observed upon computed tomography, suggesting the possibility of traumatic CAP due to manual CPR. The physical constraints in the catheterization laboratory can lead to an inappropriate CPR technique and severe traumatic complications.

Blunt traumatic right coronary artery dissection presenting with second-degree atrioventricular block and late-onset severe cardiogenic shock.

BACKGROUND: Blunt chest injury may induce several cardiovascular traumata, requiring immediate care. Right coronary artery dissection (RCA) is an extremely rare sequela in this setting and is associated with high mortality, if it remains undiagnosed. Case presentation We present the case of an RCA dissection after blunt chest trauma in a 16-year-old patient, who initially presented with a second-degree atrioventricular block as solitary manifestation on admission. Typical electrocardiographic findings, such as ST segmental changes or pathological Q waves were absent. Serial echocardiograms excluded segmental motion abnormalities, pericardial effusion or right ventricular strain. Nevertheless, a complementary computed tomography coronary angiography revealed this potentially lethal condition several hours later. The patient underwent an emergency surgical myocardial revascularization under the circulatory support of veno-arterial extracorporeal membrane oxygenation and suffered a prolonged right ventricular insufficiency with severe late-onset cardiogenic shock, due to an extensive myocardial infarction of the inferoseptal ventricular wall. CONCLUSION: Right coronary artery dissection after high-speed blunt chest injury constitutes a diagnostic challenge, especially in the absence of typical electrocardiographic and echocardiographic findings in young patients. This condition may dramatically deteriorate in time, leading to severe cardiogenic shock and life-threatening arrhythmias.

Sinus Node Dysfunction due to Occlusion of the Sinus Node Artery during Percutaneous Coronary Intervention.

BACKGROUND: Sinus node artery occlusion (SNO) is a rare complication of percutaneous coronary intervention (PCI). We analyze both the short- and long-term consequences of SNO. METHODS: We retrospectively reviewed 1379 consecutive PCI's involving RCA and Cx arteries performed in our heart institute from 2016 to 2019. Median follow-up was 44 ± 5 months. RESULTS: Among the 4844 PCIs performed during the study period, 284 involved the RCA and the circumflex's proximal segment. Periprocedural SNO was estimated by angiography observed in 15 patients (5.3%), all originated from RCA. The majority of SNO occurred during urgent and primary PCIs following acute coronary syndrome (ACS). Sinus node dysfunction (SND) appeared in 12 (80%) of patients. Four (26.6%) patients had sinus bradycardia, which resolved spontaneously, and 8 (53.3%) patients had sinus arrest with an escaped nodal rhythm, which mostly responded to medical treatment during the first 24 hours. There was no association between PCI technique and outcome. Three patients (20%) required urgent temporary ventricular pacing. One patient had permanent pacemaker implantation. Pacemaker interrogation during follow-up revealed a recovery of the sinus node function after one month. CONCLUSION: SNO is rare and seen mostly during angioplasty to the proximal segment of the RCA during ACS. The risk of developing sinus node dysfunction following SNO is high. SND usually appears during the first 24 h of PCI. The majority of SND patients responded to medical treatment, and only in rare cases were permanent pacemakers required.

Clinical Outcomes of Self-Made Polyurethane-Covered Stent Implantation for the Treatment of Coronary Artery Perforations.

OBJECTIVES: The present study aimed to investigate the short- and long-term clinical outcomes of self-made polyurethane-covered stents (PU-CS) in patients for the management of coronary artery perforation (CAP) during percutaneous coronary intervention (PCI). BACKGROUND: Coronary artery perforation is reckoned as a serious complication in PCI and associated with considerable morbidity and mortality. Covered stents have been used for treating the life-threatening CAP during PCI. But in some catheterization laboratories, no commercial CS is immediately available when there is an urgent need for CS to rescue the coronary rupture site. METHODS: We retrospectively identified 24 patients who underwent 31 self-made PU-CS implantations due to CAP in Zhongshan Hospital, Fudan University, from June 2015 to January 2020. RESULTS: The total procedural success rate of CS to seal the perforation was 79.2%. Nine patients (37.5%) developed cardiac tamponade, of which 8 patients (33.3%) underwent pericardiocentesis and 4 patients (16.7%) underwent cardiac surgeries. Except for 4 cardiac death cases (16.7%), none of myocardial infarction (MI), target lesion revascularization (TLR), and stent thrombosis (ST) was reported during hospital stay. Data from 22 patients (91.7%) were available at 610.4 ± 420.9 days of follow-up. Major adverse cardiac events (MACE) occurred in 6 patients (27.3%), including 5 cases of cardiac death and one TLR case. CONCLUSIONS: Self-made PU-CS demonstrates high rates of successful delivery and sealing of severe CAP during PCI. Although the in-hospital mortality remains high after PU-CS implantation, the long-term follow-up shows favorable clinical outcomes, indicating the feasibility of PU-CS in treating CAP.

Coronary artery perforation secondary to lifesaving pericardiocentesis for cardiac tamponade: a case report.

BACKGROUND: Pericardiocentesis is frequently performed when fluid needs to be removed from the pericardial sac, for both therapeutic and diagnostic purposes, however, it can still be a high-risk procedure in inexperienced hands and/or an emergent setting. CASE PRESENTATION: A 78-year-old male made an emergency call complaining of the back pain. When the ambulance crew arrived at his home, he was in a state of shock due to cardiac tamponade diagnosed by portable echocardiography. The pericardiocentesis was performed using a puncture needle on site, and the patient was immediately transferred to our hospital by helicopter. Contrast-enhanced computed tomography showed a small protrusion of contrast media on the inferior wall of the left ventricle, suggesting cardiac rupture due to acute myocardial infarction. Emergency coronary angiography was then performed, which confirmed occlusion of the posterior descending branch of the left circumflex coronary artery. In addition, extravasation of contrast medium due to coronary artery perforation was observed in the acute marginal branch of the right coronary artery. We considered that coronary artery perforation had occurred as a complication of the pericardial puncture. We therefore performed transcatheter coil embolization of the perforated branch, and angiography confirmed immediate vessel sealing and hemostasis. After the procedure, the patient made steady progress without a further increase in pericardial effusion, and was discharged on the 50th day after admission. CONCLUSIONS: When performing pericardial drainage, it is important that the physician recognizes the correct procedure and complications of pericardiocentesis, and endeavors to minimize the occurrence of serious complications. As with the patient presented, coil embolization is an effective treatment for distal coronary artery perforation caused by pericardiocentesis.

Women With Spontaneous Coronary Artery Dissection Are at Increased Risk of Iatrogenic Coronary Artery Dissection.

BACKGROUND: Spontaneous coronary artery dissection (SCAD) is a non-atherosclerotic cause of acute coronary syndrome (ACS) that affects women disproportionately. Previous case series have found that patients with SCAD undergoing cardiac catheterisation have high rates of iatrogenic coronary damage. We formally compared the rate of iatrogenic coronary artery dissection in women with and without SCAD undergoing cardiac catheterisation over a 11-year period. METHODS: Women with SCAD were identified by a search of the cardiac catheterisation database 2007-2017 for the keywords 'SCAD', 'spontaneous coronary artery dissection', 'spontaneous coronary dissection', and 'spontaneous dissection'. For each identified case, the medical record and the coronary angiogram images were reviewed to confirm spontaneous coronary dissection. For cases of recurrent SCAD, duplicates were removed so that each patient was included only once in this analysis. For each identified case of SCAD, a control case was chosen from women aged <70 years, without SCAD, undergoing cardiac catheterisation for an ACS during the same 10-year period. One control case was chosen to match each SCAD patient as closely as possible for age and year of cardiac catheterisation. Iatrogenic coronary dissection was defined as new, proximal, flow limiting coronary artery dissection in a different coronary segment to the presenting spontaneous coronary dissection. RESULTS: Eighty-five (85) cases of women with SCAD were identified. Mean age was not different between SCAD and non-SCAD women (51±11 and 51±10 years, respectively). The SCAD group had lower rates of ST elevation myocardial infarction, lower rises in serum creatine kinase (CK) and troponin levels, lower rates of diabetes and smoking, and far less placement of stents during the procedure than the control group. The rate of additional iatrogenic dissection relating to the cardiac catheterisation procedure was 4 of 85 (4.7%) versus 0 of 85 (0%), p=0.04 in SCAD and control groups, respectively, despite a much lower rate of percutaneous coronary intervention in the SCAD group. No common factors could be identified regarding particular equipment or procedural factors associated with iatrogenic dissection. CONCLUSION: The rate of iatrogenic dissection in women with SCAD during cardiac catheterisation is confirmed to be high and significantly higher than a contemporaneous age-matched group of women without SCAD. This observation likely indicates generalised coronary fragility in this disease, and emphasises the importance of the utmost care in the engagement, injection and intervention involving the coronary arteries in this disease. Development of a non-invasive coronary imaging modality or biomarker able to diagnose SCAD non-invasively would be a great advance in the care of patients with this condition, because it would avoid the need for invasive coronary angiography for diagnosis.

Sex differences in procedural and clinical outcomes following rotational atherectomy.

AIM: Evaluate sex differences in procedural net adverse clinical events and long-term outcomes following rotational atherectomy (RA). METHODS AND RESULTS: From August 2010 to 2016, 765 consecutive patients undergoing RA PCI were followed up for a median of 4.7 years. 285 (37%) of subjects were female. Women were older (mean 76 years vs. 72 years; p < .001) and had more urgent procedures (64.6 vs. 47.3%; p < .001). Females received fewer radial procedures (75.1 vs. 85.1%; p < .001) and less intravascular imaging guidance (16.8 vs. 25.0%; p = .008). After propensity score adjustment, the primary endpoint of net adverse cardiac events (net adverse clinical events: all-cause death, myocardial infarction, stroke, target vessel revascularization plus any procedural complication) occurred more often in female patients (15.1 vs. 9.0%; adjusted OR 1.81 95% CI 1.04-3.13; p = .037). This was driven by an increased risk of procedural complications rather than procedural major adverse cardiac events (MACE). Specifically, women were more likely to experience coronary dissection (4.6 vs. 1.3%; p = .008), cardiac tamponade (2.1 vs. 0.4%; p = .046) and significant bleeding (BARC ≥2: 5.3 vs. 2.3). Despite this, overall MACE-free survival was similar between males and females (adjusted HR 1.03; 95% CI 0.80-1.34; p = .81). Procedural complications during RA were associated with almost double the incidence of MACE at long-term follow-up (HR 1.92; 95% CI 1.34-2.77; p < .001). CONCLUSION: Women may be at greater risk of procedural complications following rotational atherectomy. These include periprocedural bleeding episodes and coronary perforation leading to cardiac tamponade. Despite this, the adjusted overall long-term survival free of major adverse cardiac events was similar between males and females.

Use of "super-glue" to seal a perforation during chronic total occlusion coronary intervention and the potential to "unglue" it.

Coronary perforation remains a dreaded complication of chronic total occlusion (CTO) percutaneous coronary intervention (PCI). We present a case of successful CTO recanalization complicated by a perforation treated by n-butyl-cyanoacrylate (medical "super-glue"). We also present an in vitro experiment showing that a glue plug in a plastic tube can acutely be passed by a low tip load guide wire and undergo balloon angioplasty recreating a lumen. These results suggest that n-butyl-cyanoacrylate glue may be an alternative for treating perforation during CTO PCI with the possibility of recanalizing the vessel through the glue plug at a later time.

Transcatheter closure of coronary artery fistula: A 21-year experience.

OBJECTIVES: To evaluate the outcomes of transcatheter coronary artery fistula (CAF) closure and to identify anatomic/procedural factors that may impact outcomes. BACKGROUND: Due to the rarity of CAF, reported experience with transcatheter closure remains limited and anatomic and procedural factors that may lead to unsuccessful closure, complications, or recanalization of CAF are unclear. METHODS: All patients who underwent transcatheter CAF closure at Mayo Clinic from 1997 to 2018 were retrospectively reviewed. CAF anatomic characteristics, procedural techniques, and clinical/angiographic outcomes were assessed. RESULTS: A total of 45 patients underwent transcatheter closure of 56 CAFs. The most commonly used devices were embolization coils in 40 (71.4%) CAFs, vascular occluders in 10 (17.8%), or covered stent in 2 (3.6%). Acute procedural success with no or trivial residual flow occurred in 50 (89.3%) CAFs. Residual flow was small in three (5.4%) and large in three (5.4%). Eight (17.8%) patients had complications, including device migration in three, intracranial hemorrhage from anticoagulation in one, and myocardial infarction (MI) in four. MI was a result of covered stent thrombosis or stagnation of flow after closure of large distal CAF. Twenty-two patients with 27 CAFs had follow-up angiography after successful index procedure at median time of 423 (IQ 97-1348) days. Of these, 23 (85.2%) had no/trace flow and 4 had large flow from recanalization. CONCLUSIONS: Transcatheter CAF closure is associated with a favorable acute procedural success and complication rate in selected patients. Procedural success and risk for complication are highly dependent on CAF anatomy and closure technique.

Outcomes of patients who undergo percutaneous coronary intervention with covered stents for coronary perforation: A systematic review and pooled analysis of data.

OBJECTIVES: This review aims to evaluate the adverse outcomes for patients after treatment with covered stents. BACKGROUND: Coronary perforation is a potentially fatal complication of percutaneous coronary revascularization which may be treated using covered stents. Studies have evaluated long-term outcomes among patients who received these devices, but hitherto no literature review has taken place. METHODS: We conducted a systematic review of adverse outcomes for patients after treatment with covered stents. Data from studies were pooled and outcomes were compared according to stent type. RESULTS: A total of 29 studies were analyzed with data from 725 patients who received covered stents. The proportion of patients with chronic total occlusions, vein graft percutaneous coronary intervention (PCI), intracoronary imaging and rotational atherectomy were 16.9, 11.5, 9.2, and 6.6%, respectively. The stents used were primarily polytetrafluoroethylene (PTFE) (70%) and Papyrus (20.6%). Mortality, major adverse cardiovascular events, pericardiocentesis/tamponade and emergency surgery were 17.2, 35.3, 27.1, and 5.3%, respectively. Stratified analysis by use of PTFE, Papyrus and pericardial stents, suggested no difference in mortality (p = .323), or target lesion revascularization (p = .484). Stent thrombosis, pericardiocentesis/tamponade and emergency coronary artery bypass surgery (CABG) occurred more frequently in patients with PTFE stent use (p = .011, p = .005, p = .012, respectively). In-stent restenosis was more common with pericardial stent use (<.001, pooled analysis for first- and second-generation pericardial stents). CONCLUSIONS: Cases of coronary perforation which require implantation of a covered stent are associated with a high rate of adverse outcomes. The use of PTFE covered stents appears to be associated with more stent thrombosis, pericardiocentesis/tamponade, and emergency CABG when compared to Papyrus or pericardial stents.

Dichloroacetate prevents restenosis in preclinical animal models of vessel injury.

Despite the introduction of antiproliferative drug-eluting stents, coronary heart disease remains the leading cause of death in the United States. In-stent restenosis and bypass graft failure are characterized by excessive smooth muscle cell (SMC) proliferation and concomitant myointima formation with luminal obliteration. Here we show that during the development of myointimal hyperplasia in human arteries, SMCs show hyperpolarization of their mitochondrial membrane potential (ΔΨm) and acquire a temporary state with a high proliferative rate and resistance to apoptosis. Pyruvate dehydrogenase kinase isoform 2 (PDK2) was identified as a key regulatory protein, and its activation proved necessary for relevant myointima formation. Pharmacologic PDK2 blockade with dichloroacetate or lentiviral PDK2 knockdown prevented ΔΨm hyperpolarization, facilitated apoptosis and reduced myointima formation in injured human mammary and coronary arteries, rat aortas, rabbit iliac arteries and swine (pig) coronary arteries. In contrast to several commonly used antiproliferative drugs, dichloroacetate did not prevent vessel re-endothelialization. Targeting myointimal ΔΨm and alleviating apoptosis resistance is a novel strategy for the prevention of proliferative vascular diseases.

Comparative study of tapered versus conventional cylindrical balloon for stent implantation in stenotic tapered artery.

The natural tapering of coronary arteries often creates a dilemma for optimal balloon sizing during stenting. The influence of different balloon types, namely, a tapered balloon and a conventional cylindrical balloon, on the mechanical performance of the stent as well as arterial mechanics was investigated via the finite element method. Stent free-expansion and stent deployment in a stenotic tapered artery were investigated numerically. The biomechanical behavior of the two balloon types was compared in terms of stent foreshortening, stent deformation, stent stress distribution, and arterial wall stress distribution. Results indicate that balloon types affect the transient behavior of the stent and the arterial mechanics. Specifically, a tapered balloon could maintain the natural tapering of the coronary artery after stent expansion. In contrast to a cylindrical balloon, tapered balloon also mitigated the foreshortening of the stent (7.69%) as well as the stress concentration in the stent and artery (8.61% and 4.17%, respectively). Hence, tapered balloons should be used in tapered arteries as they may result in low risk of artery injury. This study might provide insights for improved balloon choice and presurgical planning.

Myocardial Infarction Due to Coronary Artery Injury following High Force Blunt Trauma to the Upper Chest: A Case Illustrating the Prehospital, Hospital and Autopsy Findings.

Myocardial infarction (MI) is a rare complication of blunt chest trauma (BCT). We describe an extensive antero-lateral MI due to thrombosis of the left main stem coronary artery following a blow to the lower face and upper anterior chest during an industrial accident in a 52-year-old male. The patient presented with acute left ventricular failure. Our case highlights MI as an important differential in a BCT patient presenting with hypoxia where lung pathology has been excluded. We aim to highlight the importance of cardiac assessment in trauma scenarios particularly where patients are unable to report symptoms. Our patient sadly did not survive his injuries. This case describes MI following BCT from the initial prehospital presentation through to postmortem findings and adds to the limited literature on the pathological mechanisms underpinning this rare complication.

Post-traumatic left anterior descending artery dissection.

BACKGROUND: Patients who experience trauma, particularly thoracic trauma, may be at risk for missed cardiac injury. CASE REPORT: We present a case of a 36-year-old male presenting to the Emergency Department (ED) as a trauma after a high-speed motor vehicle crash. After computed tomography (CT) scans revealed a right hemopneumothorax and multiple orthopedic injuries, the patient was admitted to the trauma neuroscience intensive care unit (TNICU), where telemetry revealed ST elevations. An electrocardiogram (EKG) was performed and he was noted to have an acute anterolateral STEMI. The patient was intubated and underwent a cardiac catheterization that revealed a dissection of his left anterior descending (LAD) coronary artery and a stent was successfully placed. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: In cases of trauma patients who can't report the symptoms they are experiencing, or have distracting injury, there is the potential for a missed diagnosis of either significant cardiac injury and/or myocardial infarction (MI). Emergency physicians should be aware that an EKG is recommended in the ED evaluation of a trauma patient, especially those with thoracic trauma.

Dramatic resolution of an immediate postoperative distortion of the circumflex artery during mitral valve surgery.

Injury or distortion of the circumflex coronary artery can occur during mitral valve surgery, due to its proximity to the mitral valve annulus. We present the case of a 72-year-old male patient with symptomatic mitral regurgitation, who underwent minimally invasive mitral valve surgery. The initial reparative gesture was complicated by intraoperative infarct due to a distortion of the circumflex artery (CX) caused by the rigidity of the ring used; the mainstay of the treatment was the removal of the previous device implanted in favor of a flexible one with restitutio ad integrum of the CX patency.

Iatrogenic Dissection of The Right Coronary Artery and The Ascending Aorta Secondary to Percutaneous Coronary Intervention: A Case Report.

Iatrogenic dissections of coronary artery and aorta is a rare and potentially fatal event, often following percutaneous coronary intervention (PCI). The prognosis of patients often depends on early accurate diagnosis and timely and effective treatment. There are no definite guidelines for the treatment of acute coronary artery dissection caused by PCI. Here, we report a 50-year-old patient with iatrogenic dissection of the right coronary artery and type A aortic dissection who underwent PCI for chest pain. We performed emergency surgery of right coronary artery ostium repair, aortic valvoplasty, ascending aorta replacement, and aortic arch descending stent implantation for the patient. The operation went smoothly, and the patient successfully was discharged two weeks after the operation.

Sandwich Technique to Manage Right Ventricular Perforation During Beating Heart Coronary Artery Bypass Grafting.

Identification of an intramyocardial left anterior descending artery remains challenging and many techniques have been proposed for its identification. The exposure technique depends on the surgeon's familiarity and experience with it, and inadvertent right ventricular perforation during exposure on off-pump surgery results in bleeding, which requires urgent cardiopulmonary support and repair. Inadequate repair may result in continued bleeding, closure of the left anterior descending artery, and myocardial infarction. We describe a sandwich technique using the native left anterior descending artery and the bypass graft to repair right ventricular perforation, avoiding closure of this main artery and preserving graft patency.

Natural cardiac death after stent implantation with iatrogenic injury of a coronary artery.

In forensic practice, autopsies are regularly carried out in cases of suspected medical malpractice to determine whether a treatment resulted in death. Intraoperative deaths, as well as deaths shortly after an operation, can be particularly suspicious as iatrogenic. We report a case of a 75-year-old woman with a complaint of intermittent angina pectoris who underwent cardiac catheterization. Intra-interventionally, coronary artery dissection occurred and was stabilized by the placement of two stents. After this procedure, the patient suffered from chest pain. At 5.5 h after the procedure ended, the woman suddenly and unexpectedly died. At forensic autopsy, a hemopericardium with cardiac tamponade was found to have been caused by the rupture of a myocardial infarction that was several days old and had remained clinically unrecognized. This case report illustrates the importance of forensic autopsies in terms of external quality assurance in medicine.