High frequency notching of the QRS complex is associated with transmural infarction, cardiomyopathies, and ventricular hypertrophy from any cause. The mechanism producing notching is unknown; but the presence of a discrete anatomic lesion is not an essential feature. The hypothesis that notching was produced by activation across, rather than along, myocardial fibers was investigated by stimulat...

Methods: Preoperative orthopantomograms (OPGs) were examined and the proximity of the IDC to the roots of impacted mandibular third molars was categorized into the following: groups: superimposition, adjacent, perforation, grooving, notching, or none. The categories notching, grooving, and perforation were regrouped together and called the true relationship between the IDC and the root apices. ...

Until 1948 notching of the ribs was considered to be pathognomonic of coarctation of the aorta. Batchelder and Williams (1948), however, drew attention to unilateral notching of the ribs in a patient with tetralogy of Fallot. Unilateral notching is rare, but can occur on the right side when the coarctation is proximal to, or includes, the left subclavian artery (Bayley and Holoubek, 1940; Campb...

OBJECTIVE To study the role of uterine artery notch on color Doppler ultrasound and roll over test in prediction of PIH. METHODS 100 women with high risk pregnancies were studied for presence or absence of uterine artery diastolic notch by Doppler ultrasound at 16-28 weeks. Same women were then subjected to roll over test at 28-32 weeks. RESULTS The primary outcome was that uterine diastoli...

Surface charge dissipation on insulator surfaces can reduce local charging potentials thereby preventing ion trajectory deflection at the bottom of trenches that leads to lateral sidewall etching ~notching!. We perform detailed Monte Carlo simulations of pattern-dependent charging during etching in high-density plasmas with the maximum sustainable surface electric field as a parameter. Signific...

The angiocardiograms of 17 patients with aortic arch interruption are reviewed to emphasize the variations in arch interruption and origin of the brachiocephalic vessels, and collateral circulation to the descending aorta. Depending on the anatomical type and subtype of arch interruption, collateral flow to the descending aorta in the presence of a stenotic or closed ductus will be dependent on...

From the Department of Cardiology, Sri Jayadeva Institute of Cardiovascular Sciences & Research, Bangalore, India. Manuscript received September 27, 2012; accepted October 2, 2012. A19-year-old male with cyanosis and clubbing was diagnosed with tetralogy of Fallot (TOF). Chest x-ray (A) showed prominent rib notching involving the left hemithorax (arrow). Major aortopulmonary collaterals (arrows...

p i J a To the Editor: The transition from the QRS complex to the ST-segment on the 12-lead electrocardiogram (ECG) has been conventionally termed the ST junction (STj). Occasionally, the terminal portion of the QRS complex manifests a notch or slur when transiting into the ST-segment. This has been described as a normal variant in healthy individuals (1) in whom STj is very often elevated. The...