759 Intermittent right atrial high rate pacing in the intact sheep: a model to provoke persistent AF

EP Europace ◽  
2005 ◽  
Vol 7 ◽  
pp. 171-171
Keyword(s):  
High Rate ◽  
Right Atrial

scholarly journals 759 Intermittent right atrial high rate pacing in the intact sheep: a model to provoke persistent AF

EP Europace ◽  
2005 ◽  
Vol 7 (Supplement_1) ◽  
pp. 171-171
Author(s):  
M. Fromer ◽  
J. Schlaepfer ◽  
P. Ruchat ◽  
J.-P. Gardaz
Keyword(s):  
High Rate ◽  
Right Atrial

scholarly journals P1701 Biatrial thrombus detection in a patient with atrial paroxysmal fibrillation and asymptomatic massive pulmonary embolism

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
I Refatllari ◽  
A Banushi ◽  
H Gjergo ◽  
A Goda
Keyword(s):  
Pulmonary Artery ◽  
Troponin I ◽  
Nyha Class ◽  
Good Condition ◽  
High Rate ◽  
Right Atrial ◽  
Close Monitoring ◽  
Ecg Changes ◽  
Noninvasive Test ◽  
The Right

Abstract Introduction Computed tomography (CT) is a noninvasive test for detection of LA and LAA thrombus.Although the transesophageal echocardiogram is the gold standart method, it can have rare but potential life threatening complications.Case report:A 62 y.o woman presented to the ER complaining of palpitations started less then 12h ago with no chest pain or dispnea.She was diagnosed with high rate paroxysmal atrial fibrillation (HR∼120/min).The ECG showed AF with no specific changes,the troponin I (TPI) level was negative and a TTE revealed a dilated left atria.The other lab results were within normal range(TBC and blood chemistry).Her past medical history included hypertension and diabetes type 2 for 10 years and 6 months respectively both on regular treatment and obesity.Also 2 months ago she was diagnosed with Hashimoto thyroiditis and close monitoring of TSH was recommended but no treatment.Subsequently,LMWH (enoxaparin) and amiodarone loading dose for cardioversion were started.After 24h the pt was still in AF,with a controlled heart rate and no complains.However ECG changes were noticed (evolutive T negative waves in leads D1,D2,aVL,V3-V6).A D-Dimer was requested and came back negative,O2 saturation was 97%.The asymptomatic pt was transferred to the Cardiology ward for further evaluation.TPI remained negative.Due to the cardiac risk factors and the ECG changes it was decided to perfom a coronary angiography which resulted normal.An electrical cardioversion was considered.Both TEE and pulmonary angio CT were requested prior.Because of the ECG changes the CT was performed first and showed central and peripheric bilateral pulmonary artery clots present also in both the left and right atrial auricles.Due to the massive thromboembolism(PE) unfractioned heparin was immediately started (aPTT 50-70s).A new TTE showed a PAP of 50 mmHg.Approximately 10h after the heparin infusion,the pt became hypotensive and started complaining of dyspnea,tachypnea,cough,pleuritic pain and fever(high temperature 39.5-40ᵒC).Considering the deteriorating conditions she was consulted by a cardiac surgery team and it was decided to perform an emergency surgical pulmonary embolectomy despite the high risk.Within 24h,the pt underwent a surgical embolectomy of the right and left pulmonary branches after incision of the pulmonary artery, as well as a clot embolectomy of the right and left atria auricles (confirmed by intraoperatory TEE).She was put on an iv heparin regimen and recovered well.She was discharged 2 weeks later in good condition,with a PAP of 40 mmHg,on acenocoumarol with persistent AF.1.5 years later she is in NYHA class I,in sinus rhythm taking rivaroxaban 20 mg/d.Discussion: Biatrial thrombus detection in both atrial auricles is rare as well as in this case a massive PE without a stroke.CT can be used as an alternative modality for detecting thrombus in selected high risk patients because it shows a good diagnostic accuracy with high sensitivity and specificity. Abstract P1701 Figure. Biatrial clots on CT and removed ones

Structure of Palladium Single-Crystal Films Prepared by Flash Evaporation onto (001) NaCl Substrates

1970 ◽  
Vol 28 ◽  
pp. 456-457
Author(s):  
L. E. Murr ◽  
G. Wong
Keyword(s):  
Single Crystal ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
High Rate ◽  
Flash Evaporation ◽  
Optimum Load ◽  
Single Crystal Films ◽  
Crystal Films ◽  
A Current

Palladium single-crystal films have been prepared by Matthews in ultra-high vacuum by evaporation onto (001) NaCl substrates cleaved in-situ, and maintained at ∼ 350° C. Murr has also produced large-grained and single-crystal Pd films by high-rate evaporation onto (001) NaCl air-cleaved substrates at 350°C. In the present work, very large (∼ 3cm2), continuous single-crystal films of Pd have been prepared by flash evaporation onto air-cleaved (001) NaCl substrates at temperatures at or below 250°C. Evaporation rates estimated to be ≧ 2000 Å/sec, were obtained by effectively short-circuiting 1 mil tungsten evaporation boats in a self-regulating system which maintained an optimum load current of approximately 90 amperes; corresponding to a current density through the boat of ∼ 4 × 104 amperes/cm2.

Rapid Freezing of Freeze-Etch Specimens

1980 ◽  
Vol 38 ◽  
pp. 752-755
Author(s):  
A. Elgsaeter ◽  
T. Espevik ◽  
G. Kopstad
Keyword(s):  
Low Temperature ◽  
Metal Surface ◽  
Relative Velocity ◽  
Thermal Contact ◽  
High Rate ◽  
Rapid Freezing ◽  
Temperature Decrease ◽  
Freeze Etching

The importance of a high rate of temperature decrease (“rapid freezing”) when freezing specimens for freeze-etching has long been recognized1. The two basic methods for achieving rapid freezing are: 1) dropping the specimen onto a metal surface at low temperature, 2) bringing the specimen instantaneously into thermal contact with a liquid at low temperature and subsequently maintaining a high relative velocity between the liquid and the specimen. Over the last couple of years the first method has received strong renewed interest, particularily as the result of a series of important studies by Heuser and coworkers 2,3. In this paper we will compare these two freezing methods theoretically and experimentally.

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