1978
DOI: 10.1136/hrt.40.6.602
|View full text |Cite
|
Sign up to set email alerts
|

Abstract: SUMMARY Haemodynamic studies were performed in 30 patients at a mean interval of 43-4 (range 27 to 59) months after aortic valve replacements-withpericardial xenografts. Five valve sizes-19, 21, 23, 25, and 27 mm annulus diameter-were used. Of these 30 patients, 16 had preoperative haemodynamic investigations. Comparison of the pre-and postoperative data showed a marginal but significant increase in cardiac output (P < 0.05). There was a significant reduction in the pulmonary wedge and left ventricular en… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1

Citation Types

0
1
0
1

Year Published

1980
1980
1985
1985

Publication Types

Select...
5
2

Relationship

0
7

Authors

Journals

citations
Cited by 30 publications
(2 citation statements)
references
References 12 publications
0
1
0
1
Order By: Relevance
“…'I--3 Aortic valvular stenosis can coexist with various types of subvalvular obstruction.2-14A9 These associated lesions cannot always be demonstrated angiographically, even by left ventriculography in several views. In such cases, obstructive lesions are best diagnosed from pressure gradients detected by catheter pullback from the ventricle to the proximal aorta.2 3, 10, 12, 19 Persistence or recurrence of intraventricular gradients shown by repeated or serial postoperative catheterization signals inadequate resection or regrowth of subvalvular obstructive lesions and possibly the need for further surgical resection.6 [20][21][22][23][24][25] Clinical investigation of normal ejection dynamics has shown that dynamic factors associated with flow contribute to physiologic transvalvular pressure gradients.26 Studies of flow dynamics in hypertrophic cardiomyopathy have cast strong doubt on the premise that large intraventricular pressure gradients are always a consequence of an anatomic obstruction of the outflow tract region.27 Improved instrumentation for measuring pressure28 33 has led to the frequent observation of subvalvular gradients in patients with valvular aortic stenosis without subvalvular pathology in our *The term gradients in this paper is used in the conventional hemodynamic sense, but in fluid dynamic terms represents a driving pressure difference evaluated across a finite distance in the direction of flow. …”
mentioning
confidence: 99%
“…'I--3 Aortic valvular stenosis can coexist with various types of subvalvular obstruction.2-14A9 These associated lesions cannot always be demonstrated angiographically, even by left ventriculography in several views. In such cases, obstructive lesions are best diagnosed from pressure gradients detected by catheter pullback from the ventricle to the proximal aorta.2 3, 10, 12, 19 Persistence or recurrence of intraventricular gradients shown by repeated or serial postoperative catheterization signals inadequate resection or regrowth of subvalvular obstructive lesions and possibly the need for further surgical resection.6 [20][21][22][23][24][25] Clinical investigation of normal ejection dynamics has shown that dynamic factors associated with flow contribute to physiologic transvalvular pressure gradients.26 Studies of flow dynamics in hypertrophic cardiomyopathy have cast strong doubt on the premise that large intraventricular pressure gradients are always a consequence of an anatomic obstruction of the outflow tract region.27 Improved instrumentation for measuring pressure28 33 has led to the frequent observation of subvalvular gradients in patients with valvular aortic stenosis without subvalvular pathology in our *The term gradients in this paper is used in the conventional hemodynamic sense, but in fluid dynamic terms represents a driving pressure difference evaluated across a finite distance in the direction of flow. …”
mentioning
confidence: 99%
“…Ein kleiner Klappendurchmesser hat daher hohe Druckverluste zur Folge, während durch große Klappendurchmesser die Druckverluste verringert werden könnten [14]. Gabbay …”
Section: Methodsunclassified