The effects of premature atrial contractions on hemodynamics with coronary heart disease and hypertension without basic cardiovascular disease / 重庆医学

Objective To explore the effects of premature atrial contractions on hemodynamics combined with coronary heart disease and hypertension .Methods According to the advance rate ,62 patients with premature atrial contractions were invided into 3 groups : 40% group(n= 24) .All of the patients were performed imped‐ance cardiography .The hemodynamics indexes at different times were compared ,and the variation rates in hemodynamics of the three groups combined with basic diseases were analyzed .Results Stroke volume(SV) ,stroke index(SI) ,aortic compliance(AC) , stroke work(SW) ,stroke work index(SWI) ,and heather index(HI) were smallest when premature atrial contractions ,which were middle when the first sinus beats before premature atrial contractions ,and largest when the first sinus beats after premature atrial contractions(P 40% group(P 40% group(P< 0 .05) .Conclusion The advance rate is relatively large in patients with basic cardiovascular disease .Premature atrial contractions has certain effects on hemodynamics ,and the effects are positively correlated with advance rate .

Successful Percutaneous Transcatheter Retrieval of a Migrated Implantable Venous Port in a Patient Who Presented with Intermittent Palpitation / 대한내과학회지

The totally implantable venous port device is used in patients undergoing chemotherapy. The complications associated with this device include venous thrombosis, infection, catheter fracture, extravasation, and intravascular dislodgement. The incidence of port catheter dislodgement is low. The treatment of choice for port dislocation involves immediate retrieval of the distal migrated part, and percutaneous transcatheter retrieval is regarded as the standard method. A 40-year-old female presented with intermittent palpitation. She was referred from the Department of General Surgery after detection of a fractured and dislocated implantable venous port system into the main pulmonary artery. We successfully retrieved the dislocated fractured device using a 5-Fr pigtail catheter and snare catheter. We herein report this case with a literature review.

Electrocardiographic characteristics and radiofrequency catheter ablation of ventricular tachycardia and frequent ventricular premature contractions originating from left ventricular outflow tract / 中国基层医药

Objective To investigate the electrocardiographic(ECG) characteristics and assess the safety of radiofrequency catheter ablation (RFCA) of ventricular tachyeardia (VT), and frequent ventricular premature con- tractious(VPCs) originating from left ventricular outflow tract(LVOT). Methods Twelve-lead ECG analysis and RFCA were performed in 9 patient with VT or VPCs originating from LVOT. Results The sites to be successfully ablated were in left valsalva sinus in 6 patients,and subaortic valve in 3 patient. ECG revealed tall R wave in leads Ⅱ, Ⅲ ,aVF, V5 and V6. QS morphology in both leads aVR and aVL,QS morphology in lead Ⅰ in most cases. R wave in lead Ⅰ was relative tall, the R/S wave amplitude in lead V1 was over 0.62 ,and precordia R wave transition was irregular. All 9 patients were successfully ablated. No death or recurrenced case during follow-up. Conclusion Ventricular taehycardia and frequent ventricular premature rcontractions originating from left ventricutar outflow tract could be known by some specific ECG characteristics and could be radically treated safely by RFCA.