We read with great interest the article entitled “Fluorophotometric Study of the Effect of the Glaukos Trabecular Microbypass Stent on Aqueous Humor Dynamics” by Fernández-Barrientos et al. The authors examined aqueous humor dynamics before and after surgery in eyes undergoing cataract surgery and the implantation of the bypass stent (group 1) and in eyes undergoing cataract surgery alone (grou...

DOI: 10.5935/abc.20140157 A 43-year-o ld male pat ient presented wi th a complaint of palpitation. Electrocardiography revealed premature ventricular contraction (PVC) that appeared to be originating from the left ventricular outflow tract. Tall positive R waves were observed in leads II, III, and aVF, and the R transition was observed at V2 in precordial leads. A notch was realized on the down...

The accuracy of Doppler-estimated pressure gradients in the setting of irregular, multiple, and tunnellike stenoses was investigated. An in vitro model of the left ventricular outflow tract was designed to allow pulsatile flow of red cells in saline across valve orifices from 0.01 to 2.5 cm2. Simultaneous pressure gradients were estimated by both Doppler and direct-pressure manometer techniques...

Tachycardia induced tachycardias are not common in clinical practice, and it is believed that most cases of double tachycardia are coincidental. The existence of two different tachycardias in the same patient almost always poses problems in the electrophysiology laboratory. However, in rare instances, the emergence of a second tachycardia can actually provide invaluable information about the fi...

Echocardiography detected a mobile left ventricular tumour. The tracing showed a cluster of echoes in the left ventricular outflow tract corresponding to the location of the tumour as confirmed by cineangiograms. At operation, a thrombus was discovered, attached to a chorda tendineae.

The outflow in SDSS J0300+0048 has the highest column density yet reported for a broad absorption line quasar. The absorption from different ions is also segregated as a function of velocity in a way that can only be explained by a disk wind outflow. Furthermore, the presence of the such large column densities of gas at the high observed outflow velocities may be incompatible with purely radiat...

Two cases are presented of accelerated aortic allograft fibrocalcification after right ventricular outflow tract (RVOT) reconstruction occurring within 2 months after surgery in a 5-year-old and 22-month-old. Potential determinants of early calcification, clinical management after implantation and surgical alternatives are discussed.

Outflow tract ventricular tachycardia (OT-VT) can originate from several different segments of the outflow tract. Various ECG criteria have been proposed for localization of OT-VTs. We present two patients, one with left and one with right OT-VT. We used local ventricular electrograms in the coronary sinus to localize the focus of the OT-VT. Mapping of local ventricular electrograms in the coro...

Noninvasive Input Impedance of the Human Systemic Circulation To the Editor: The study of noninvasive aortic input impedance by Segers et al1 is a very important step in understanding age-related changes in humans and an advance on previous limited invasive studies conducted decades ago.2,3 One reason that these lapsed was the difficulty in accurately measuring aortic pulsatile flow, attributab...