7 research outputs found

    Association of erectile dysfunction with the ability to exercise

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    Association of erectile dysfunction with the ability to exercisePurpose: Exercise stress testing (EST) is crucial to determine cardiovascular (CV) risk in men with erectile dysfunction (ED). Low exercise workload, a slower rate of recovery following exercise and an impaired capacity to increase heart rate (HR) during exercise testing (chronotropic incompetence) are independent predictors of adverse CV outcomes. Aim of this study was to investigate the association between these EST parameters with the presence and severity of ED. Methods:180 ED patients and 50 age-matched men without ED underwent maximal EST. In addition, 20 patients in the first group were evaluated again after taking sildenafil for 6 weeks Exercise parameters including exercise capacity (metabolic equivalents, METS), peak exercise time, HR at 6 METS, peak exercise and HR recovery (HRR) at 1 and 2 minwere evaluated in all individuals. Chronotropic index (CI) was calculated as [(HRpeak –HRrest)/ (220– age– HRrest)]. Endothelial function was evaluated with flow-mediated dilatation of the brachial artery (FMD). Results: ED patients had lower peak exercise time and thus lower calculated exercise capacity (P<0.001) and reduced CI (P<0.01) compared to men without ED. HRR was not different between ED and non-ED individuals. There was a significant association of ED severity with duration of exercise, peak workload, HRR 2 minutes after exercise, and CI (all P<0.05). There also was a positive relation of HRR and CI with brachial FMD (all P<0.05). There was even increased flow-mediated dilatation of the brachial artery (FMD), lowering C- reactive protein (CRP) and an increase of the maximum exercise capacity as estimated metabolic equivalents (METS) after treatment with sildenafil.Conclusions: The present study shows interrelationships between maximal exercise capacity, HRR, CI and ED. Abnormal HRR and CI is associatedwith systemic endothelial dysfunction. It also appears that even the administration of sildenafil has a favorable effect on endothelial function and, by extension, in exercise capacity..These findings imply pathophysiological links and may have important implications for the estimation of CV risk in men with ED.Συσχέτιση της στυτικής δυσλειτουργίας με την ικανότητα για άσκησηΣκοπός: Η δοκιμασία κόπωσης είναι ζωτικής σημασίας για τον προσδιορισμό του καρδιαγγειακού κινδύνου σε άντρες με στυτική δυσλειτουργίας. Το χαμηλό ωφέλιμο έργο άσκησης, ο βραδύτερος ρυθμός αποκατάστασης μετά την άσκηση και η μειωμένη ικανότητα αύξησης της καρδιακής συχνότητας κατά τη διάρκεια της άσκησης (χρονότροπη ανεπάρκεια) αποτελούν ανεξάρτητους προγνωστικούς παράγοντες δυσμενών καρδιαγγειακών εξελίξεων. Σκοπός της παρούσας μελέτης ήταν να διερευνήσει τη σχέση μεταξύ αυτών των παραμέτρων της άσκησης με την παρουσία και τη σοβαρότητα της στυτικής δυσλειτουργίας. Μέθοδοι: 180 ασθενείς με στυτική δυσλειτουργία και 50 ίδιας ηλικίας άνδρες χωρίς στυτική δυσλειτουργία υποβλήθηκαν σε μέγιστη δοκιμασία κόπωσης. Επίσης 20 ασθενείς της πρώτης ομάδας αξιολογήθηκαν εκ νέου μετά την λήψη σιλδεναφίλης για 6 εβδομάδες. Οι παράμετροι της άσκησης συμπεριλαμβανομένων της ικανότητας για άσκηση (μεταβολικά ισοδύναμα, ΜΕΤS),του χρονικού σημείου της μέγιστης άσκησης, της καρδιακής συχνότητας στα 6 ΜΕΤS, της μέγιστης άσκησης και της καρδιακής συχνότητας αποκατάστασης στο 1 και στα 2 λεπτά αξιολογήθηκαν σε όλα τα άτομα. Ο Δείκτης Χρονότροπης απάντησης (CI) υπολογίστηκε ως [(μέγιστη ΚΣ –ΚΣ ηρεμίας)/ (220– ηλικία– ΚΣ ηρεμίας )]. Η ενδοθηλιακή λειτουργία αξιολογήθηκε με βάση την ενδοθηλιοεξαρτώμενη αγγειοδιαστολή της βραχιονίου αρτηρίας (FMD) .Αποτελέσματα: Οι ασθενείς με στυτική δυσλειτουργία είχαν χαμηλότερο χρόνο μέγιστης άσκησης και κατ’ επέκταση μικρότερη ικανότητα άσκησης (Ρ <0.001) καθώς και χαμηλότερο δείκτη χρονότροπης απάντησης (CI) (Ρ <0,01) σε σύγκριση με εκείνους που δεν είχαν στυτική δυσλειτουργία. Η καρδιακή συχνότητα αποκατάστασης δεν διέφερε μεταξύ των ατόμων με στυτική και χωρίς στυτική δυσλειτουργία. Υπήρχε μια σημαντική συσχέτιση μεταξύ της βαρύτητας της στυτικής δυσλειτουργίας με τη διάρκεια της άσκησης, του μέγιστου έργου άσκησης, την καρδιακή συχνότητα αποκατάστασης στα 2 λεπτά μετά την άσκηση και του δείκτη χρονότροπης απάντησης (όλα τα P <0,05).Υπήρξε, επίσης, μια θετική σχέση της καρδιακής συχνότητας αποκατάστασης και του δείκτη χρονότροπης απάντησης με την ενδοθηλιοεξαρτώμενη αγγειοδιαστολή της βραχιονίου αρτηρίας (FMD) (όλα τα P <0,05).Παρατηρήθηκε ακόμη αύξηση της ενδοθηλιοεξαρτώμενης αγγειοδιαστολής της βραχιονίου αρτηρίας (FMD), μείωση των επιπέδων της C- αντιδρώσας πρωτείνης (CRP) καθώς και αύξηση της μέγιστης ικανότητας για άσκηση εκτιμώμενης ως μεταβολικά ισοδύναμα (ΜΕΤS) μετά τη θεραπεία με σιλδεναφίλη. Συμπεράσματα: Η παρούσα μελέτη δείχνει αλληλοεξαρτήσεις μεταξύ της μέγιστης ικανότητας για άσκηση, της καρδιακής συχνότητας αποκατάστασης, του δείκτη χρονότροπης απάντησης και της στυτικής δυσλειτουργίας. Μη φυσιολογική καρδιακή συχνότητα αποκατάστασης και δείκτης χρονότροπης απάντησης συνδέονται με συστηματική ενδοθηλιακή δυσλειτουργία. Επίσης διαφαίνεται ακόμη ότι η χορήγηση σιλδεναφίλης έχει ευνοϊκή επίδραση στην ενδοθηλιακή λειτουργία και κατ’ επέκταση και στην ικανότητα για άσκηση.Τα ευρήματα αυτά συνεπάγονται παθοφυσιολογικές συνδέσεις και μπορεί να έχουν σημαντικές εφαρμογές για την εκτίμηση του καρδιαγγειακού κινδύνου σε άνδρες με στυτική δυσλειτουργία

    Platinum Priority -Sexual Medicine Relationship of Asymmetric Dimethylarginine With Penile Doppler Ultrasound Parameters in Men with Vasculogenic Erectile Dysfunction

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    Please visit www.eu-acme.org/ europeanurology to read and answer questions on-line. The EU-ACME credits will then be attributed automatically. Abstract Background: Asymmetric dimethylarginine (ADMA), a selective endogenous nitric oxide synthase inhibitor, is elevated in many conditions associated with erectile dysfunction (ED), such as hypertension, diabetes, hyperlipidemia, and renal failure; it is also increased in men with coronary artery disease and ED. The dynamic penile colour Doppler ultrasound is considered the gold standard for the evaluation of penile vascular damage. Objective: We investigated whether the extent of ultrasonographically documented penile vascular disease is associated with higher ADMA levels. Design, setting, and participants: One hundred four consecutive ED patients (mean age: 56 AE 9 yr) without manifest cardiovascular/atherosclerotic disease and 31 subjects with normal erectile function matched for age and traditional risk factors were studied. Measurements: We evaluated penile dynamic colour Doppler parameters of arterial insufficiency (peak systolic velocity) and veno-occlusive dysfunction (end diastolic velocity) and measured systemic inflammatory markers/mediators. Results and limitations: Compared to men without ED, ED patients had significantly higher ADMA levels ( p &lt; 0.001). ADMA was significantly increased in patients with severe arterial insufficiency (PSV &lt; 25 cm/s) compared to subjects with borderline insufficiency and men with normal penile arterial function ( p &lt; 0.001, by analysis of variance). Multivariable analysis adjusting for age, mean pressure, other risk factors, high-sensitivity C-reactive protein, testosterone, and treatment showed independent inverse association between ADMA level and peak systolic velocity ( p &lt; 0.01). The combination of higher ADMA level with arterial insufficiency showed greater impact on 10-yr risk of a cardiovascular event compared to either parameter alone. Conclusions: ADMA level is independently associated with ultrasonographically documented poor penile arterial inflow. This finding underlines the important role of ADMA as a marker of penile arterial damage and implies a contribution of this compound to the pathophysiology of generalised vascular disease associated with ED

    Relationship of Asymmetric Dimethylarginine With Penile Doppler Ultrasound Parameters in Men with Vasculogenic Erectile Dysfunction

    No full text
    Background: Asymmetric dimethylarginine (ADMA), a selective endogenous nitric oxide synthase inhibitor, is elevated in many conditions associated with erectile dysfunction (ED), such as hypertension, diabetes, hyperlipidemia, and renal failure; it is also increased in men with coronary artery disease and ED. The dynamic penile colour Doppler ultrasound is considered the gold standard for the evaluation of penile vascular damage. Objective: We investigated whether the extent of ultrasonographically documented penile vascular disease is associated with higher ADMA levels. Design, setting, and participants: One hundred four consecutive ED patients (mean age: 56 +/- 9 yr) without manifest cardiovascular/atherosclerotic disease and 31 subjects with normal erectile function matched for age and traditional risk factors were studied. Measurements: We evaluated penile dynamic colour Doppler parameters of arterial insufficiency (peak systolic velocity) and veno-occlusive dysfunction (end diastolic velocity) and measured systemic inflammatory markers/mediators. Results and limitations: Compared to men without ED, ED patients had significantly higher ADMA levels (p &lt; 0.001). ADMA was significantly increased in patients with severe arterial insufficiency (PSV &lt; 25 cm/s) compared to subjects with borderline insufficiency and men with normal penile arterial function (p &lt; 0.001, by analysis of variance). Multivariable analysis adjusting for age, mean pressure, other risk factors, high-sensitivity C-reactive protein, testosterone, and treatment showed independent inverse association between ADMA level and peak systolic velocity (p &lt; 0.01). The combination of higher ADMA level with arterial insufficiency showed greater impact on 10-yr risk of a cardiovascular event compared to either parameter alone. Conclusions: ADMA level is independently associated with ultrasonographically documented poor penile arterial inflow. This finding underlines the important role of ADMA as a marker of penile arterial damage and implies a contribution of this compound to the pathophysiology of generalised vascular disease associated with ED. Published by Elsevier B.V. on behalf of European Association of Urology

    Beneficial Effect of Vardenafil on Aortic Stiffness and Wave Reflections

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    Although vardenafil is widely prescribed for erectile dysfunction (ED), its effect on arterial function is not defined. Aortic stiffness, aortic pressures, and wave reflections are predictors of cardiovascular risk. The investigators assessed the hypothesis that vardenafil acutely improves aortic stiffness, aortic pressures, and wave reflections in ED patients. Twelve ED patients (mean age 58 +/- 9 years) received vardenafil 20 mg in a randomized, placebo-controlled, double-blind, 2-way crossover design. Aortic stiffness was evaluated with carotid-femoral pulse wave velocity (PWV); wave reflections and aortic pressures were evaluated with augmentation index (AIx) and systolic, diastolic, and pulse pressure of the aortic pressure waveform, respectively. PWV, aortic pressures, and AIx were measured at baseline and for 3 hours after vardenafil intake or placebo. PWV decreased significantly (by 0.7 m/s, P = .001), denoting a decrease in aortic stiffness. AIx decreased significantly (by 7%, P = .008), denoting a decreased effect of wave reflections from the periphery. Aortic pressures decreased significantly (all P &lt; .05). Statin use at baseline significantly interacted with the effects of treatment on both PWV and AIx (P = .003 and P &lt; .001, respectively). This study shows, for the first time, that vardenafil has a favorable acute effect on aortic stiffness and wave reflection in ED patients
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