Marisa Varrenti

Dr. Marisa Varrenti

De Gasperis Cardio Center and Transplant Center, Niguarda Hospital, 20126 Milan, Italy
orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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7 April 2025 in Diagnostics
Verified
Journal Article
Open access
PDF file
CTChiara Tognola
Chiara Tognola
AMALESSANDRO MALOBERTI
ALESSANDRO MALOBERTI
MVMarisa Varrenti
Marisa Varrenti
PMPatrizio Mazzone
Patrizio Mazzone
CGCristina Giannattasio
Cristina Giannattasio
FGFabrizio Guarracini
Fabrizio Guarracini
Myocardial infarction with nonobstructive coronary arteries (MINOCA) is an increasingly recognized clinical entity characterized by myocardial injury in the absence of a significant coronary artery obstruction. MINOCA encompasses a diverse range of pathophysiological mechanisms, including coronary plaque disruption, coronary vasospasm, coronary microvascular dysfunction, thromboembolism, and spontaneous coronary artery dissection. A systematic diagnostic approach is essential to identify the underlying etiology and guide appropriate management strategies. Advanced imaging techniques, particularly cardiac magnetic resonance, play a pivotal role in distinguishing ischemic from non-ischemic myocardial injury and refining prognosis. Despite growing awareness, standardized treatment protocols remain limited, with current management largely extrapolated from strategies used in obstructive coronary artery disease. Notably, MINOCA is significantly more prevalent in women, emphasizing the need to understand sex-related differences in its pathophysiology, presentation, and clinical outcomes. This narrative review offers a comprehensive and up-to-date overview of MINOCA, including a dedicated chapter on sex-related considerations. It integrates recent advancements and highlights the importance of personalized management strategies.

14 January 2024 in Journal of Clinical Medicine
Verified
Journal Article
Open access
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MVMarisa Varrenti
Marisa Varrenti
APAlberto Preda
Alberto Preda
Antonio FronteraAntonio Frontera
Antonio Frontera
MBMatteo Baroni
Matteo Baroni
LGLorenzo Gigli
Lorenzo Gigli
PMPatrizio Mazzone
Patrizio Mazzone
Arrhythmogenic cardiomyopathy (ACM) is a heart disease characterized by a fibrotic replacement of myocardial tissue and a consequent predisposition to ventricular arrhythmic events, especially in the young. Post-mortem studies and the subsequent diffusion of cardiac MRI have shown that left ventricular involvement in arrhythmogenic cardiomyopathy is common and often develops early. Regarding the arrhythmic risk stratification, the current scores underestimate the arrhythmic risk of patients with arrhythmogenic cardiomyopathy with left involvement. Indeed, the data on arrhythmic risk stratification in this group of patients are contradictory and not exhaustive, with the consequence of not correctly identifying patients at a high arrhythmic risk who deserve protection from arrhythmic death. We propose a literature review on arrhythmic risk stratification in patients with ACM and left involvement to identify the main features associated with an increased arrhythmic risk in this group of patients.

14 January 2024 in Diagnostics
Verified
Journal Article
Open access
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APAlberto Preda
Alberto Preda
EBEleonora Bonvicini
Eleonora Bonvicini
ECElena Coradello
Elena Coradello
ATAlessio Testoni
Alessio Testoni
LGLorenzo Gigli
Lorenzo Gigli
FGFabrizio Guarracini
Fabrizio Guarracini
Fluoroscopy has always been the cornerstone imaging method of interventional cardiology procedures. However, radiation exposure is linked to an increased risk of malignancies and multiorgan diseases. The medical team is even more exposed to X-rays, and a higher incidence of malignancies was reported in this professional group. In the last years, X-ray exposure has increased rapidly, involving, above all, the medical team and young patients and forcing alternative fluoroless imaging methods. In cardiac electrophysiology (EP) and pacing, the advent of 3D electroanatomic mapping systems with dedicated catheters has allowed real-time, high-density reconstruction of both heart anatomy and electrical activity, significantly reducing the use of fluoroscopy. In addition, the diffusion of intracardiac echocardiography has provided high anatomical resolution of moving cardiac structures, providing intraprocedural guidance for more complex catheter ablation procedures. These methods have largely demonstrated safety and effectiveness, allowing for a dramatic reduction in X-ray delivery in most arrhythmias’ ablations. However, some technical concerns, as well as higher costs, currently do not allow their spread out in EP labs and limit their use to only procedures that are considered highly complex and time-consuming and in young patients. In this review, we aim to update the current employment of fluoroless imaging in different EP procedures, focusing on its strengths and weaknesses.

Verified
Journal Article
Open access
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LGLorenzo Gigli
Lorenzo Gigli
SSSimone Sala
Simone Sala
APAlberto Preda
Alberto Preda
KOKenji Okubo
Kenji Okubo
Giovanni PerettoGiovanni Peretto
Giovanni Peretto
PBPaolo Della Bella
Paolo Della Bella
Background: The brain and heart are strictly linked and the electrical physiologies of these organs share common pathways and genes. Epilepsy patients have a higher prevalence of electrocardiogram (ECG) abnormalities compared to healthy people. Furthermore, the relationship between epilepsy, genetic arrhythmic diseases and sudden death is well known. The association between epilepsy and myocardial channelopathies, although already proposed, has not yet been fully demonstrated. The aim of this prospective observational study is to assess the role of the ECG after a seizure. Materials and Methods: From September 2018 to August 2019, all patients admitted to the emergency department of San Raffaele Hospital with a seizure were enrolled in the study; for each patient, neurological, cardiological and ECG data were collected. The ECG was performed at the time of the admission (post-ictal ECG) and 48 h later (basal ECG) and analyzed by two blinded expert cardiologists looking for abnormalities known to indicate channelopathies or arrhythmic cardiomyopathies. In all patients with abnormal post-ictal ECG, next generation sequencing (NGS) analysis was performed. Results: One hundred and seventeen patients were enrolled (females: 45, median age: 48 ± 12 years). There were 52 abnormal post-ictal ECGs and 28 abnormal basal ECGs. All patients with an abnormal basal ECG also had an abnormal post-ictal ECG. In abnormal post-ictal ECG, a Brugada ECG pattern (BEP) was found in eight patients (of which two had BEP type I) and confirmed in two basal ECGs (of which zero had BEP type I). An abnormal QTc interval was identified in 20 patients (17%), an early repolarization pattern was found in 4 patients (3%) and right precordial abnormalities were found in 5 patients (4%). Any kind modification of post-ictal ECG was significantly more pronounced in comparison with an ECG recorded far from the seizure (p = 0.003). A 10:1 higher prevalence of a BEP of any type (particularly in post-ictal ECG, p = 0.04) was found in our population compared to general population. In three patients with post-ictal ECG alterations diagnostic for myocardial channelopathy (BrS and ERP), not confirmed at basal ECG, a pathogenic gene variant was identified (KCNJ8, PKP2 and TRMP4). Conclusion: The 12-lead ECG after an epileptic seizure may show disease-related alterations otherwise concealed in a population at a higher incidence of sudden death and channelopathies. Post-ictal BEP incidence was higher in cases of nocturnal seizure.

28 August 2023 in Life
Verified
Journal Article
Open access
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APAlberto Preda
Alberto Preda
CMClaudio Montalto
Claudio Montalto
MGMichele Galasso
Michele Galasso
AMAndrea Munafo
Andrea Munafo
IGIlaria Garofani
Ilaria Garofani
FGFabrizio Guarracini
Fabrizio Guarracini
Intraprocedural stroke is a well-documented and feared potential risk of cardiovascular transcatheter procedures (TPs). Moreover, subclinical neurological events or covert central nervous system infarctions are concerns related to the development of dementia, future stroke, cognitive decline, and increased risk of mortality. Cerebral protection devices (CPDs) were developed to mitigate the risk of cardioembolic embolism during TPs. They are mechanical barriers designed to cover the ostium of the supra-aortic branches in the aortic arch, but newer devices are able to protect the descending aorta. CPDs have been mainly designed and tested to provide cerebral protection during transcatheter aortic valve replacement (TAVR), but their use in both Catheterization and Electrophysiology laboratories is rapidly increasing. CPDs have allowed us to perform procedures that were previously contraindicated due to high thromboembolic risk, such as in cases of intracardiac thrombosis identified at preprocedural assessment. However, several concerns related to their employment have to be defined. The selection of patients at high risk of thromboembolism is still a subjective choice of each center. The aim of this review is to update the evidence on the use of CPDs in either Cath labs or EP labs, providing an overview of their structural characteristics. Future perspectives focusing on their possible future employment are also discussed.

9 January 2025 in Diagnostics
Verified
Journal Article
Open access
PDF file
CTChiara Tognola
Chiara Tognola
GRGiacomo Ruzzenenti
Giacomo Ruzzenenti
AMALESSANDRO MALOBERTI
ALESSANDRO MALOBERTI
MVMarisa Varrenti
Marisa Varrenti
PMPatrizio Mazzone
Patrizio Mazzone
FGFabrizio Guarracini
Fabrizio Guarracini
Anderson–Fabry disease (AFD) is a rare X-linked lysosomal storage disorder characterized by the accumulation of globotriaosylceramide, leading to multi-organ involvement and significant morbidity. Cardiovascular manifestations, particularly arrhythmias, are common and pose a considerable risk to affected individuals. This overview examines current approaches to arrhythmic risk stratification in AFD, focusing on the identification, assessment, and management of cardiac arrhythmias associated with the disease. We explore advancements in diagnostic techniques, including echocardiography, cardiac MRI, and ambulatory ECG monitoring, to enhance the detection of arrhythmogenic substrate. Furthermore, we discuss the role of genetic and biochemical markers in predicting arrhythmic risk and the implications for personalized treatment strategies. Current therapeutic interventions, including enzyme replacement therapy and antiarrhythmic medications, are reviewed in the context of their efficacy and limitations. Finally, we highlight ongoing research and future directions with the aim of improving arrhythmic risk assessment and management in AFD. This overview underscores the need for a multidisciplinary approach to optimize care and outcomes for patients with AFD.