Strategy of pacemaker and electrode replacement for superior vena cava stenosis.

Cardiac implantable devices are commonly used for superior vena cava stenosis, but there have been few reports of electrode replacement in the stenosed superior vena cava. A 73-year-old man was diagnosed with second-degree type II atrioventricular block and a permanent dual-chamber, rate-modulated pacing pacemaker was implanted 10 years previously. Because of depletion of the pacemaker battery and an increase in the ventricular pacing threshold, replacement of the pacemaker and ventricular electrode was required.

Establishment of risk prediction model and risk score for in-hospital mortality in patients with AECOPD.

Objective: Risk stratification for patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD) may help clinicians choose appropriate treatments and improve the quality of care.

Methods: A total of 695 patients hospitalized with AECOPD from January 2015 to December 2017 were considered. They were assigned to a death and a survival cohort.

Successful treatment of left main coronary artery total occlusion combined with cardiogenic shock.

Acute myocardial infarction (AMI) caused by total occlusion of the left main coronary artery (LMCA) is a catastrophic event. However, the clinical features and appropriate treatment of patients with this condition remain unclear. We report a man with total occlusion of the LMCA presenting with AMI combined with cardiogenic shock.

Left atrial myxoma complicated with multi-system embolization.

Background: Atrial myxoma accounts for approximately 50% of all cardiac tumors. The majority of myxomas are located in the left atrium and present variable clinical manifestation.

Case Presentation: A young man was transferred to our hospital with sudden onset of resting pain, pallor and numb in right leg.

[Design and verification of Luo-Ye pump-based stress formation for cultivation of tissue-engineered blood vessel].

Objective: To improve Luo-Ye pump-based stress-forming system and optimize the stimulating effect on smooth muscle cells during cultivation of tissue-engineered blood vessels (TEBV).

Methods: A new Luo-Ye pump-based TEBV 3D culture system was developed by adding an air pump to the output of the bioreactor. A pressure guide wire was used to measure the stress at different points of the silicone tube inside the TEBV bio-reactor, and fitting curves of the stress changes over time was created using Origin 8.

Development of contrast-induced acute kidney injury after elective contrast media exposure in patients with type 2 diabetes mellitus: effect of albuminuria.

Background: The influence of albuminuria and urinary pH on the development of contrast-induced acute kidney disease (CI-AKI) in patients with type 2 diabetes mellitus (T2DM) after elective coronary angiography (CAG) or percutaneous coronary intervention (PCI) is unknown.

Methods: CI-AKI was defined as an increase in serum creatinine >26.4 µmol/L or ≥50% of baseline value within 48 hours after contrast media exposure.