Infectious complications of percutaneous cardiac procedures

Surgical management of drug-eluting stent associated coronary artery aneurysms: a case series

Drug-eluting stents (DES) have been introduced to counter the in-stent restenosis associated with bare metal stents. However, the mechanism of action of DES results in a counter-productive effect of coronary artery aneurysm (CAA) formation. Although CAA after the implantation of drug-eluting stents (DES) is a rare occurrence with an incidence rate of up to 0.5%, they are increasingly being detected due to the progressive rise in the usage of DES for the management of coronary artery disease (CAD). Due to the rarity of this condition, evidence and guidelines regarding the management strategies for this condition are still lacking. We present a series of 5 cases of CAA, post-DES implantation, who were all successfully managed with surgical intervention.

A Case Report of Sepsis Post Cardiac Catheterization

Percutaneous coronary intervention (PCI) and cardiac catheterization are clean procedures done under aseptic precautions, but studies have shown transient bacteremia following the process, mostly involving Staphylococcus. This has many complications, from localized wounds at arterial access sites to endocarditis, mycotic aneurysm, and sepsis, and are associated with high mortality. These may require surgical intervention and prolonged antibiotic use. The risk of acquiring these infections is higher in femoral catheterization than in radial access. This risk also increases in patients with congestive cardiac failure, age 60 and above, and those with diabetes and obesity. Procedural hazards include multiple punctures and leaving the sheath for future access due to the needle tract's colonization. We present a case of sepsis presenting two days after PCI using single puncture radial access and a rapid downhill course.

Coronary stent infection: a systematic review

Coronary stent infection (CSI) is the rarest complication associated with the percutaneous coronary intervention, occurring in less than 0.1% of cases. So far, all reported instances are limited to case reports. CSI presents itself in various, often confusing, ways in clinical settings. Therefore, the current systematic review summarizes reports of CSI's clinical presentations, causative pathogens, diagnoses and treatments. This systematic review considered three online databases, using reference lists as an additional source. All case reports or case series with stent infection in the coronary artery were included - however, reviews or commentaries, articles not published in English, and articles mentioning a history of hemodialysis or any surgery were excluded. Thirty-two studies on 34 CSI patients were included in the final qualitative analysis. CSI predominantly affected males of a wide range of ages. The most common symptoms were chest pain and fever with various onsets. Interestingly, CSI usually occurred during the first stent implantation. Cultures and coronary angiography were the most common methods used to diagnose CSI. Furthermore, drug-eluting stents had a higher risk of infection than bare-metal stents. Aneurysms were the most frequent abnormalities observed in infected stents. The bacteria that most often caused CSI were Staphylococcus aureus and Pseudomonas aeroginosa. More than 90% of the reports mentioned using various antibiotics, and 74% mentioned carrying out surgery. Finally, a mortality rate of 26.47% among CSI patients was calculated.

Unusual Presentation of a Rapidly Progressive Coronary Artery Pseudoaneurysm after Drug Eluting Stent Placement

Infected coronary artery aneurysm (CAA) is a rare complication of percutaneous coronary intervention (PCI) and is associated with high morbidity and mortality. The management of infected CAA is unclear and is based on the clinical and imaging features. We report an interesting case of a giant infected right CAA secondary to Pseudomonas aeruginosa within four weeks of a drug eluting stent (DES) implantation. Chronological analysis of the coronary angiograms and computed tomography coronary angiography revealed rapid progression in the size of the aneurysm from small to a giant CAA over a period of four weeks. Patient remained afebrile throughout the hospital stay without any signs of septicaemia. In view of the rapid progression in size, surgical aneurysmal ligation with distal revascularisation was done with good post-operative recovery. Afebrile presentation of an infected CAA is very rarely reported in the literature as in our case. Early diagnosis using multimodality imaging and immediate surgical intervention are the cornerstone in the management of giant infected CAAs.

[Vascular access-site infections in percutaneous cardiac interventions: A significant risk?]

Vascular access site infections are infrequent and rarely reported as a potential complication of percutaneous cardiac intervention. A case of access site infection is reported with a literature review. Femoral access is mainly concerned in some circumstances: delayed sheath withdrawal, vascular complications (hematoma, false-aneurysm, arteriovenous fistula), or use of hemostatic closure device. These infectious complications are always serious requiring medical and surgical treatment and potentially associated with life-threatening complications. Preventive measures should be applied in order to reduce the risks: optimisation of femoral punctures with the support of echography guidance, avoid a new puncture in a area with hematoma, femoral angiographic evaluation and strict aseptic precautions with vascular closure devices, and obviously preferential choice of radial access.

Acute adrenal insufficiency as a mysterious cause of shock following percutaneous coronary intervention: a cardiologist's nightmare

The differential diagnosis of shock following percutaneous coronary intervention (PCI) is vast. Access site complications and bleeding can cause hypovolemic shock. Peri-procedural myocardial infarction, abrupt closure, stent thrombosis, coronary dissection and coronary perforation have a stormy presentation. Vasovagal shock is manifested by bradycardia and hypotension and quickly responds to atropine. Anaphylactic shock secondary to contrast administration can be stormy but usually responds to steroids or adrenaline. Septicemia due to unsterile techniques can cause a less dramatic shock. Acute adrenal insufficiency causing shock following PCI has not been described to the best of our knowledge. We report the case of a 54-year-old woman who underwent successful multivessel PCI. She had refractory unexplained shock following the PCI with no much response from inotropic or intra-aortic balloon pump. After ruling out all possible causes of shock and clinical suspicion of adrenal insufficiency, she was treated with steroids resulting in dramatic improvement in her hemodynamics.