The electrocardiogram is an important tool for the initial diagnostic suspicion of hypertrophic cardiomyopathy in any of its forms, both in symptomatic and in asymptomatic patients because it is altered in more than 90 percent of the cases. Electrocardiographic anomalies are more common in patients carriers of manifest hypertrophic cardiomyopathy and the electrocardiogram alterations are earlie...

18. von der Groeben J, Fisher DD, Toole JG: Temporospatial frequency distribution of P, QRS, and T in normal man and woman. Am Heart J 75: 487, 1968 19. Ishikawa H: Sex and age differences in the Frank vectorcardiograms of normal Japanese adults. Jap Circ J 37: 543, 1973 20. Simonson E: The effect of age on the electrocardiogram. Am J Cardiol 29: 64, 1972 21. McCall BW, Wallace AG, Estes EH Jr:...

PURPOSE To verify the relationship between the clinician's vocal evaluation and vocal self-assessment and voice-related quality of life. METHODS Participants were 96 individuals: 48 with vocal complaints and voice deviation (VCG), mean age of 51 years, with diagnosis and indication of voice therapy; and 48 with no vocal complaints and healthy voices (NVCG), mean age of 46 years. All participa...

We develop optimal VCG mechanisms in order to assign identical economic “bads” (for example, costly tasks) to agents. The optimal non-deficit VCG mechanism achieves asymptotic budget balance, yet the non-deficit requirement is incompatible with reasonable welfare bounds. If we omit the non-deficit requirement, individual rationality greatly changes the relationship between burning a budget surp...

IN COMMON vectoreardiographic practice, vector loops are recorded in three plalne projections that are perpendicular to one another (frontal, sagittal, and horizontal planes). The arbitrary choice of these planes has been derived from body axes rather than from the spatial orientation of the vectorcardiogram or the heart itself. Several investigators1'-" have proposed, therefore, to replace the...

HERE have been no reports on the U vector loop or arc of ventricular premature beats. Recently a systematic study was carried out on the vectorcardiogram of ventricular premature beats. The QRS and T vector loop of the ventricular premature beats will be reported elsewhere. Since the U vector loop could not be studied in all these cases because of technical difficulties, and since it needs a de...

Cardiac resynchronization therapy (CRT) is a well-known treatment modality for patients with a reduced left ventricular ejection fraction accompanied by a ventricular conduction delay. However, a large proportion of patients does not benefit from this therapy. Better patient selection may importantly reduce the number of non-responders. Here, we review the strengths and weaknesses of the electr...