Di Micco L.,A. Landolfi Hospital |
Salvi P.,San Luca Hospital |
Salvi P.,University of Milan Bicocca |
Bellasi A.,Sant Anna Hospital |
And 2 more authors.
Blood Purification | Year: 2013
Background: The subendocardial viability ratio (SEVR), calculated by pulse wave analysis, is an index of myocardial oxygen supply and demand. Here we analyze the relation between SEVR and cardiovascular mortality in the chronic kidney disease (CKD) population of a post hoc analysis of a multicenter, prospective, randomized, nonblinded study. Methods: We studied 212 consecutive asymptomatic outpatients receiving care at 12 nephrology clinics in south Italy. Inclusion criteria were age >18 years, 6 months of follow-up before the enrollment and stage 3-4 CKD. Results: During follow-up, 34 subjects died, 29 of them for cardiovascular causes. SEVR correlated inversely with vascular calcifications (r =-0.37) and myocardial mass (r =-0.45); SEVR changed from 1.33 ± 0.24 to 1.36 ± 0.16 (p = NS; baseline and final values, respectively) in living patients, and from 1.16 ± 0.31 to 0.68 ± 0.26 in deceased patients (p < 0.001). Kaplan-Meier curves show that that a greater reduction of SEVR values during the study (third tertile) significantly predicts cardiovascular mortality (p < 0.0001). Conclusions: This post hoc analysis shows that a reduction of SEVR values impacts cardiovascular mortality in CKD patients. © 2013 S. Karger AG, Basel.
Parati G.,San Luca Hospital |
Parati G.,University of Milan Bicocca |
Dolan E.,Stroke and Hypertension Unit |
Ley L.,Boehringer Ingelheim |
Schumacher H.,Boehringer Ingelheim
Journal of Hypertension | Year: 2014
Objectives: High 24-h ambulatory blood pressure (ABP) variability is associated with poor cardiovascular outcomes. We analysed a large ABP monitoring database containing data from hypertensive patients treated with telmisartan/amlodipine combination or various monotherapies with the aim of quantifying the 24-h distribution of blood pressure (BP) reduction by treatment through the smoothness index and of developing and testing a new treatment-on-variability index (TOVI) to quantify the effects of treatment on both mean BP and BP variability. Methods: ABP data were pooled from 10 studies (N=4294) with a median follow-up of 60 days. Smoothness index was calculated by dividing the mean of treatment-induced hourly BP reductions by its SD. TOVI was calculated as the ratio of the mean of hourly BP reductions to weighted 24-h BP SD (weighted mean of daytime and night-time SDs) under treatment. Results: The SBP/DBP smoothness index and TOVI values of telmisartan/amlodipine combination were significantly (P<0.0001) higher (smoothness index: 1.81/1.51; TOVI: 2.71/2.13) compared with telmisartan 80mg (smoothness index: 1.12/0.90; TOVI: 1.55/1.23), amlodipine 10mg (smoothness index: 1.33/1.09; TOVI: 2.09/1.58), valsartan 160mg (smoothness index: 1.01/0.81; TOVI: 1.35/1.07), ramipril 10mg (smoothness index: 0.83/0.63; TOVI: 1.11/0.87) and placebo (smoothness index: 0.23/0.18; TOVI: 0.34/0.30), indicating a smoother 24-h BP reduction profile (higher smoothness index) as well as the achievement of significantly lower and smoother BP levels over 24h (higher TOVI) with the combination. Conclusion: As compared with various monotherapies, the telmisartan/amlodipine combination was associated with a smoother BP reduction over 24h and with a more favourable balance between mean 24-h BP reduction and the degree of BP variability on treatment, reflecting both its effectiveness in lowering BP levels and its longer duration of action the agreement between smoothness index and TOVI demonstrates that they are similarly effective in the differentiation of antihypertensive treatments, although providing conceptually different information, the clinical relevance of which needs to be tested by ad-hoc outcome studies. © 2014 Wolters Kluwer Health | Lippincott Williams Wilkins.
Capuano N.,San Luca Hospital |
Del Buono A.,Biomedical University of Rome |
Maffulli N.,Center for Sports and Exercise Medicine
Operative Orthopadie und Traumatologie | Year: 2015
Objective: The goals of a tissue-preserving minimally invasive approach to the hip are to allow early short-term recovery, achieve hip joint stability, minimize muscle strength loss from surgery, spare the peri-articular soft tissues, and allow unrestricted motion in the long term. Indications: Hip arthroplasty in patients with no pre-existing hardware, with a sufficient space between the acetabular rim and greater trochanter; management of subcapital femoral fractures in older patients. Contraindications: Protrusio acetabuli. Joint stiffness. This is the main concern when undertaking the superior capsulotomy. Stiffness may result from bone causes, including ankylosis, large osteophytes, bone bridges etc., extra-articular retraction of surrounding soft tissues with capsular contracture of both ligaments and muscles, or a combination of bony and soft tissues causes, resulting in limited adduction. Indeed, maximal adduction is necessary to increase the distance between the apex of the greater trochanter and the superior acetabular edge. In the approach described in the present article, the real limitation is the impossibility to introduce a straight stem through the trochanteric fossa without weakening the trochantericarea. If adduction is restricted, excessive lateralization of the femoral stem would result in postoperative pain and discomfort, especially as we advocate immediate full weight bearing. Even though patients fare better when the trochanteric area is intact, many types of stem such as the GTS (Biomet), or stem Microplasty (Biomet) or even stem Parva (Adler Ortho) may pressurize the internal bone of the trochanteric structures. Therefore, these stems may be implanted in maximal hip adduction. This is the case in coxa profunda or coxa vara, which require more invasive and destabilizing surgical approaches. Surgical technique: Lateral position, 5–8 cm incision from the tip of the greater trochanter, identification and transaction of piriformis tendon. Anterior mobilization of the gluteus minimus and exposure of the trochanteric fossa. Removal of the superior portion (bone block) of the head and neck, and preparation of the femoral canal. Preparation of the acetabulum. Complete muscle relaxion is helpful to proceed to satisfactory trial reduction. Postoperative management: Patients may progress to motion and weight bearing without restriction. Results: From April 2009 to December 2010, the first author operated on 463 patients, 275 for osteoarthrosis of the hip, and 188 for subcapital fractures of the femoral neck. Thereof, 375 (75 %) patients could walk with full weight within 6 h from the operation, and climb stairs 24 h later with low loss of blood, and rapid recovery. © 2015, Springer-Verlag Berlin Heidelberg.
Dias da Silva V.J.,University of Milan |
Dias da Silva V.J.,Federal University of Triangulo Mineiro |
Tobaldini E.,University of Milan |
Rocchetti M.,University of Milan Bicocca |
And 4 more authors.
Cardiovascular Research | Year: 2015
Aims Bradycardic agents are currently used in the treatment of angina and heart failure; direct information on their effects on cardiac sympathetic nerve activity (SNA) may be relevant to their chronic use. The present study evaluates the effect of pacemaker inhibition on SNA; direct nerve recordings and indirect autonomic indexes are compared. Methods and results Experiments were performed in 18 anaesthetized rats. SNA (direct nerve recording) and heart rate variability (HRV) indexes were evaluated in parallel. All parameters were recorded 10 min before to 60 min after administration of the If blocker ivabradine (IVA; 2 mg/kg, i.v.; n = 8) or vehicle (VEH; n = 5). IVA-induced RR interval (RR) prolongation (at 60 min +15.0 ± 7.1%, P < 0.01) was associated with decreased diastolic arterial pressure (DAP; -17.3 ± 8.4%, P < 0.05) and increased SNA (+51.1 ± 12.3%, P < 0.05). These effects were accompanied by increased RR variance (RRσ2), which showed strong positive correlation with RR. Frequency-domain HRV indexes (in normalized units) were unchanged by IVA. After baroreceptor reflexes had been eliminated by sino-aortic denervation (n = 5), similar IVA-induced RR prolongation (at 60 min +14.3 ± 5.9%, NS vs. intact) was associated with a larger DAP reduction (-30.9 ± 4.1%, P < 0.05 vs. intact), but failed to affect SNA. Conclusions (i) IVA-induced bradycardia was associated with increased SNA, resulting from baroreceptor unloading; if this applied to chronic IVA use in humans, it would be of relevance for therapeutic use of the drug. (ii) Whenever mean HR is concomitantly changed, time-domain HRV indexes should not be unequivocally interpreted in terms of autonomic balance. © 2015 Published on behalf of the European Society of Cardiology.
Salvi P.,San Luca Hospital |
Palombo C.,University of Pisa |
Salvi G.M.,Cardiovascular Research Laboratory |
Labat C.,University of Lorraine |
And 5 more authors.
Journal of Applied Physiology | Year: 2013
Several studies showed a positive association between heart rate and pulse wave velocity, a sensitive marker of arterial stiffness. However, no study involving a large population has specifically addressed the dependence of pulse wave velocity on different components of the cardiac cycle. The aim of this study was to explore in subjects of different age the link between pulse wave velocity with heart period (the reciprocal of heart rate) and the temporal components of the cardiac cycle such as left ventricular ejection time and diastolic time. Carotid-femoral pulse wave velocity was assessed in 3,020 untreated subjects (1,107 men). Heart period, left ventricular ejection time, diastolic time, and early-systolic dP/dt were determined by carotid pulse wave analysis with high-fidelity applanation tonometry. An inverse association was found between pulse wave velocity and left ventricular ejection time at all ages (<25 years, r2 = 0.043; 25-44 years, r2 = 0.103; 45-64 years, r2 = 0.079; 65-84 years, r2 = 0.044; ≥85 years, r2 = 0.022; P = 0.0001 for all). A significant (P = 0.0001) negative but always weaker correlation between pulse wave velocity and heart period was also found, with the exception of the youngest subjects (P=0.20). A significant positive correlation was also found between pulse wave velocity and dP/dt (P = 0.0001). With multiple stepwise regression analysis, left ventricular ejection time and dP/dt remained the only determinant of pulse wave velocity at all ages, whereas the contribution of heart period no longer became significant. Our data demonstrate that pulse wave velocity is more closely related to left ventricular systolic function than to heart period. This may have methodological and pathophysiological implications. Copyright © 2013 the American Physiological Society.