Pietro Guida

Pietro Guida

*This is an algorithmically generated author record based on publicly available information.

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Pietro Guida has a total of 92 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Open Access

    Cardiovascular Prognosis in Stable Patients with Cardiac Amyloidosis: A Novel and Simple Risk Score

    by Ilaria Dentamaro, Pietro Guida, Yassin Belahnech, Marco Maria Dicorato, Paolo Basile, Maria Cristina Carella, Francesco Mangini, Eduardo Urgesi, Sergio Dentamaro, Cinzia Forleo, et al.

    Background: Cardiac amyloidosis (CA) is frequently diagnosed in clinically stable patients, yet the risk of subsequent heart failure (HF) hospitalization remains difficult to predict using readily available tools. Early identification of high-risk outpatients is crucial to optimize follow-up and therapeutic strategies. Purpose: To develop a simple, non-invasive risk score to predict HF hospitalization in stable patients with cardiac amyloidosis using standard electrocardiographic and echocardiographic parameters. Methods: We prospectively enrolled 100 consecutive patients with confirmed cardiac amyloidosis from three tertiary centers. Baseline evaluation included clinical assessment, electrocardiography, and transthoracic echocardiography. The primary endpoint was HF hospitalization during follow-up; secondary endpoints were HF-related and all-cause mortality. Cox regression analysis was used to identify independent predictors of HF hospitalization and to derive a point-based risk (CAMY-HF) score. Results: During a median follow-up of 36 months, 55% of patients required HF hospitalization and 47% died. Low QRS voltage, interventricular septal thickness ≥14 mm, and left ventricular ejection fraction ≤40% independently predicted HF hospitalization and were incorporated into the CAMY-HF score (range, 0–4). HF hospitalization occurred in 0% of low-risk, 47.9% of intermediate-risk, and 80.6% of high-risk patients at 3 years. Higher CAMY-HF scores were also associated with increased HF-related and all-cause mortality. Conclusions: The CAMY-HF score is a simple, widely applicable tool for early risk stratification in clinically stable patients with cardiac amyloidosis. By relying on routine ECG and echocardiographic parameters, it may help identify outpatients at high risk of HF hospitalization and guide follow-up intensity and management strategies.


  • Head-up tilt testing in patients with suspected vasovagal syncope: A meta-regression modelling

    by Pietro Guida, Federica Troisi, Antonio Di Monaco, Giusi Romanazzi, Massimo Iacoviello, Massimo Grimaldi


  • Open Access

    Effects of Novel Nutraceutical Combination on Lipid Pattern of Subjects with Sub-Optimal Blood Cholesterol Levels

    by Nicola Vitulano, Pietro Guida, Vito Abrusci, Edmondo Ceci, Edy Valentina De Nicolò, Stefano Martinotti, Nicola Duni, Federica Troisi, Federico Quadrini, Antonio di Monaco, et al.

    Background/Objectives: High concentration of plasma low-density lipoprotein cholesterol (LDL-C) is the predominant cause of atherosclerotic cardiovascular disease progression and coronary heart disease. Nutraceutical combination together with a cholesterol-lowering action provides an alternative to pharmacotherapy in patients reporting intolerance to statins and in subjects with low cardiovascular risk. The effects on lipid parameters were evaluated over 6 months for a food supplement containing aqueous extract of Berberis aristata and Olea europea, fenugreek seed extract, water/ethanol extract of artichoke leaf and phytosterols from sunflower seeds (Ritmon Colesystem®). Methods: Laboratory data were obtained at baseline from 44 otherwise healthy subjects (33 males, mean 50 ± 11 years) without cardiovascular disease having LDL-C in the range 115 to 190 mg/dL pharmacologically untreated for hypercholesterolemia. Subjects were re-evaluated at 1, 3 and 6 months during which they took one tablet of Ritmon Colesystem® after dinner. Results: At baseline, the mean values were 151 ± 21 mg/dL for LDL-C, 223 ± 24 mg/dL for total cholesterol (T-C), 52 ± 14 mg/dL for high-density lipoprotein cholesterol (HDL-C), and 124 ± 58 mg/dL for triglycerides. A significant reduction in LDL-C was observed; 9 mg/dL (95% confidence interval 3–14), 10 (4–17) and 7 (1–14) at 1, 3 and 6 months. A similar significant trend was detected for T-C while triglycerides did not show significant changes and HDL-C had lower values only at 3 months. Conclusions: These nutraceuticals in individuals with sub-optimal blood cholesterol levels at intermediate–low cardiovascular risk reduced LDL-C and T-C over 6 months contributing to the improvement of cholesterol control by dietary supplements.

  • Open Access

    Serum Markers of Bone Turnover and Bone Remodeling in Children with Noonan Syndrome: Genotype-Phenotype Correlation

    by Mariangela Chiarito, Ilaria Farella, Crescenza Lattanzio, Rossella Vitale, Flavia Urbano, Pietro Guida, Laura Piacente, Paola Muggeo, Maria Felicia Faienza

    Noonan syndrome (NS) is a genetic disorder characterized by distinctive craniofacial and skeletal features, short stature, mild to moderate developmental impairment, and multisystem involvement, notably affecting the cardiovascular, musculoskeletal, and endocrine systems. Although abnormalities of the bone matrix, as well as osteopenia and osteoporosis, are well recognized in individuals with NS and other RASopathies, the specific impact of RAS/MAPK pathway dysregulation on bone health remains poorly understood. Objectives: The aim of this study was to evaluate bone turnover and bone remodeling markers in a cohort of children with NS, to gain further insights into the bone status of these patients. Methods: In this cross-sectional, case-control study, we analyzed 28 children (20 males) with a molecular diagnosis of NS and 35 healthy subjects (21 males), matched by age and sex. We assessed markers of bone metabolism and bone turnover (calcium, phosphate, PTH, 25(OH)-vitamin D, osteocalcin, procollagen I N-propeptide-P1NP, bone alkaline phosphatase-BALP, C-telopeptides of type I collagen-CTX) and bone remodeling (RANKL, OPG, and sclerostin). Bone mineralization was measured at the lumbar spine (L2–L4) using dual-energy X-ray absorptiometry (DEXA). Results: Serum CTX levels were significantly higher in NS patients compared to controls (1.8 ± 0.7 vs. 1.3 ± 0.5 ng/mL, p = 0.0004). RANKL levels were higher in NS patients, although the difference did not reach statistical significance. No significant differences were found for OPG, sclerostin, or other markers of bone metabolism between patients and controls. Conclusions: Children with NS exhibit increased bone resorption, as indicated by elevated CTX levels, suggesting a potential imbalance in bone remodeling processes. Further studies are warranted to better define the impact of RAS/MAPK pathway dysregulation on bone health in this population.


  • Open Access

    Retrospective Clinical Investigation into the Association Between Abnormal Blood Clotting, Oral Anticoagulant Therapy, and Medium-Term Mortality in a Cohort of COVID-19 Patients

    by Giorgia Dinoi, Maria Vittoria Togo, Pietro Guida, Caterina Deruvo, Francesco Samarelli, Paola Imbrici, Orazio Nicolotti, Annamaria De Luca, Franco Mastroianni, Antonella Liantonio, et al.

    Background/Objectives: People affected by COVID-19 are exposed to abnormal clotting and endothelial dysfunction, which may trigger thromboembolic events. This study aimed at retrospectively investigating whether oral anticoagulant therapy (OAT), encompassing either direct oral anticoagulants (DOACs), mainly apixaban, or the vitamin K antagonist (VKA) warfarin, could have impacted medium-term mortality in a cohort of SARS-CoV-2 patients. Methods: Among 1238 COVID-19 patients, hospitalized from 17 March 2020 to 15 June 2021, 247 survivors and 247 deceased within 90 days from hospitalization were matched 1:1 based on age, sex, and intensive care unit (ICU) admission within three days. Conditional logistic regression was used to estimate associations by means of odds ratio (OR) with a 95% confidence interval (CI). Results: A univariate regression analysis suggested that OAT, no differently from subcutaneous low-molecular-weight heparins (LMWHs) during hospitalization, has no significant impact (p value > 0.05) on medium-term mortality. A multivariate analysis, limited to baseline variables (i.e., comorbidities and pharmacotherapies at hospital admission) showing significant association (p < 0.05) to mortality in a univariate analysis, revealed that, compared to patients living at 90 days from hospitalization, deceased patients had cancer histories (OR 1.75, CI 1.06–2.90, p = 0.029) or suffered from asthma (OR 2.25, CI 1.13–4.47, p = 0.021). In contrast, heart failure (HF), atrial fibrillation (AF), arteriopathy, chronic obstructive pulmonary disease (COPD), and kidney failure (KF), which, in a univariate analysis, were found to be associated with the endpoint (p < 0.05), lost significance in a multivariate analysis. Therapy at admission with aldosterone antagonists also appeared to be associated with medium-term mortality (OR 2.49, CI 1.52–4.08, p < 0.001); whereas, vitamin D supplementation during hospitalization appeared to be beneficial. Although not conclusive, a search into the Eudravigilance database, combined with consulting a digital predictive platform (PLATO, polypharmacology platform prediction), suggested potential off-target activities, which might contribute to increasing the severity of SARS-CoV-2 infection. Conclusions: This retrospective clinical study furnished evidences of the impact of OAT, comorbidities and other pharmacological treatments on COVID-19 clinical course.


  • Open Access

    Conventional Chemoradiotherapy Versus hypofractionated Chemoradiotherapy in Glioblastoma Multiforme Patients: Are We Ready to Change a Paradigm?

    by Fiorella Cristina Di Guglielmo, Ilaria Bonaparte, Valerio Davì, Pietro Guida, Maria Paola Ciliberti, Fabiana Gregucci, Alessia Surgo, Morena Caliandro, Roberta Carbonara, David Giraldi, et al.

    Background/Objectives: Hypofractionated radiation therapy (Hypo-RT) schedules may offer radiobiological, patient convenience, and healthcare resource advantages over standard fractionated radiation therapy (S-RT) for glioblastoma (GBM). Additionally, simulated integrated boost (SIB) Hypo-RT is proven to be an effective and safe treatment. We report on our experience regarding progression-free survival (PFS), overall survival (OS), and RT-related toxicities in GBM patients treated with Hypo-RT and S-RT. Methods: Patients with IDH-wildtype GBM received either Hypo-RT (40.05-52.5 Gy/15 fractions) or S-RT (60-70 Gy/30 fractions). Volumetric modulated arc therapy was performed for all patients. Concomitant temozolomide (75 mg/m²/day) and adjuvant chemotherapy (TMZ 150-200 mg/m² for 5 days every 28 days) were administered. OS and PFS were estimated using the Kaplan-Meier method. Results: Ninety-five patients were treated (Hypo-RT: 52, S-RT: 43). With a median follow-up of 25 months (range 9-63), the median age was 65 and 54 years for the Hypo-RT and S-RT groups, respectively. All patients tolerated the treatment well; no significant adverse effects were observed in either group. No acute or late neurological side effects of grade ≥ 2 were reported during RT. Grade 3-4 hematologic toxicity occurred in five cases, all of which interrupted concomitant TMZ (all occurring in the S-RT arm). The time to progression for the S-RT and Hypo-RT groups was 13.7 and 11.1 months, respectively (p=0.243). Regarding OS, the S-RT group had a median OS of 28.8 months compared to 17.5 months in the Hypo-RT group (p=0.007). Conclusions: Although further investigations are ongoing, a statistically significant difference exists in OS between Hypo-RT and S-RT. Hypo-RT could potentially become the standard of care not only for elderly patients but also for those with poor prognosis. Additional investigation with more data is necessary in this context to determine the best standard approach.

  • Open Access

    Retrospective Clinical Investigation Into the Association Between Abnormal Blood Clotting, Oral Anticoagulant Therapy and Medium-Term Mortality in a Cohort of COVID 19 Patients

    by Giorgia Dinoi, Maria Vittoria Togo, Pietro Guida, Caterina Deruvo, Francesco Samarelli, Paola Imbrici, Orazio Nicolotti, Annamaria De Luca, Franco Mastroianni, Antonella Liantonio, et al.

    People affected by COVID-19 are exposed to abnormal clotting and endothelial dysfunction which may trigger thromboembolic events. This study aimed at retrospectively investigating whether the oral anticoagulant therapy (OAT), encompassing either direct oral anticoagulants (DOACs), mainly apixaban, or the vitamin K antagonist (VKA) warfarin, may impact on the medium-term mortality in a large cohort of SARS-CoV-2 patients. Among 1238 COVID-19 patients, hospitalized from March 17, 2020, to June 15, 2021, 247 survivors and 247 deceased within 90 days from hospitalization were matched 1:1 based on age, sex and Intensive Care Unit (ICU) admission within three days. Conditional logistic regression was used to estimate associations by means of Odds Ratio (OR) with 95% confidence interval. Compared to patients living at 90 days, those who suffer a fatal event achieved more frequently heart failure, HF (10.5% vs 23.1%; p < 0.001), atrial fibrillation, AF (13.4% vs 22.3%; p = 0.009), as well as respiratory disease or chronic obstructive pulmonary disease (COPD), and renal failure. While HF and AF emerged as the comorbidities mainly associated to medium-term mortality of COVID-19, patients in OAT, no differently from those treated with subcutaneous low-molecular weight heparins (LMWHs) during hospitalization, did not show any significant impact on mortality. In contrast, quite surprisingly, the use of canrenone as mineralcorticoid receptor antagonist in antihypertensive therapy, appeared to worsen the clinical course of COVID-19 patients, whereas vitamin D supplementation showed beneficial effects. The use of a digital predictive platform (PLATO, Polypharmacology pLATform predictiOn) and search into the Eudravigilance database suggested potential associated off-target drug activities, such as modulation of A3 adenosine receptor, and to postulate how aldosterone antagonists might contribute to increase severity of SARS-CoV-2 infection.

  • Diagnostic yield of head-up tilt testing in suspected vasovagal syncope

    by Pietro Guida, Federica Troisi, Antonio Di Monaco, Massimo Iacoviello, Massimo Grimaldi


  • Open Access

    Improving Quality Assurance in a Radiation Oncology Using ARIA Visual Care Path

    by Ilaria Bonaparte, Federica Fragnoli, Fabiana Gregucci, Roberta Carbonara, Fiorella Cristina Di Guglielmo, Alessia Surgo, Valerio Davì, Morena Caliandro, Giuseppe Sanfrancesco, Christian De Pascali, et al.

    Purpose: Errors and incidents may occur at any point within radiotherapy (RT). The aim of the present retrospective analysis is to evaluate the impact of a customized ARIA Visual Care Path (VCP) on quality assurance (QA) for the RT process. Materials and Methods: The ARIA VCP was implemented in June 2019. The following tasks were customized and independently verified (by independent checks from radiation oncologists, medical physics, and radiation therapists): simulation, treatment planning, treatment start verification, and treatment completion. A retrospective analysis of 105 random and unselected patients was performed, and 945 tasks were reviewed. Patients’ reports were categorized based on treatment years period: 2019–2020 (A); 2021 (B); and 2022–2023 (C). The QA metrics included data for timeliness of task completion and data for minor and major incidents. The major incidents were defined as incorrect prescriptions of RT dose, the use of different immobilization systems during RT compared to the simulation, the absence of surface-guided RT data for patients’ positioning, incorrect dosimetric QA for treatment plans, and failure to complete RT as originally planned. A sample size of approximately 100 was able to obtain an upper limit of 95% confidence interval below 5–10% in the case of zero or one major incident. Results: From June 2019 to December 2023, 5300 patients were treated in our RT department, an average of 1300 patients per year. For the purpose of this analysis, one hundred and five patients were chosen for the study and were subsequently evaluated. All RT staff achieved a 100% compliance rate in the ARIA VCP timely completion. A total of 36 patients were treated in Period A, 34 in Period B, and 35 in Period C. No major incidents were identified, demonstrating a major incident rate of 0.0% (95% CI 0.0–3.5%). A total of 26 out of 945 analyzed tasks (3.8%) were reported as minor incidents: absence of positioning photo in 32 cases, lack of patients’ photo, and absence of plan documents in 4 cases. When comparing periods, incidents were statistically less frequent in Period C. Conclusions: Although the present analysis has some limitations, its outcomes demonstrated that software for the RT workflow, which is fully integrated with both the record-and-verify and treatment planning systems, can effectively manage the patient’s care path. Implementing the ARIA VCP improved the efficiency of the RT care path workflow, reducing the risk of major and minor incidents.


  • Open Access

    Brain Linac-Based Radiation Therapy: “Test Drive” of New Immobilization Solution and Surface Guided Radiation Therapy

    by Fabiana Gregucci, Ilaria Bonaparte, Alessia Surgo, Morena Caliandro, Roberta Carbonara, Maria Paola Ciliberti, Alberto Aga, Francesco Berloco, Marina De Masi, Christian De Pascali, et al.

    Aim: To test inter-fraction reproducibility, intrafraction stability, technician aspects, and patient/physician’s comfort of a dedicated immobilization solution for Brain Linac-based radiation therapy (RT). Methods: A pitch-enabled head positioner with an open-face mask were used and, to evaluate inter- and intrafraction variations, 1–3 Cone-Beam Computed Tomography (CBCT) were performed. Surface Guided Radiation Therapy (SGRT) was used to evaluate intrafraction variations at 3 time points: initial (i), final (f), and monitoring (m) (before, end, and during RT). Data regarding technician mask aspect were collected. Results: Between October 2019 and April 2020, 69 patients with brain disease were treated: 45 received stereotactic RT and 24 conventional RT; 556 treatment sessions and 863 CBCT’s were performed. Inter-fraction CBCT mean values were longitudinally 0.9 mm, laterally 0.8 mm, vertically 1.1 mm, roll 0.58°, pitch 0.59°, yaw 0.67°. Intrafraction CBCT mean values were longitudinally 0.3 mm, laterally 0.3 mm, vertically 0.4 mm, roll 0.22°, pitch 0.33°, yaw 0.24°. SGRT intrafraction mean values were: i_, m_, f_ longitudinally 0.09 mm, 0.45 mm, 0.31 mm; i_, m_, f_ laterally 0.07 mm, 0.36 mm, 0.20 mm; i_, m_, f_ vertically 0.06 mm, 0.31 mm, 0.22 mm; i_, m_, f_ roll 0.025°, 0.208°, 0.118°; i_, m_, f_ pitch 0.036°, 0.307°, 0.194°; i_, m_, f_ yaw 0.039°, 0.274°, 0.189°. Conclusions: This immobilization solution is reproducible and stable. Combining CBCT and SGRT data confirm that 1 mm CTV-PTV margin for Linac-based SRT was adequate. Using open-face mask and SGRT, for conventional RT, radiological imaging could be omitted.