Papers by Tiziano Colombo
Giornale Italiano Di Cardiologia, Feb 1, 2013
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Mt. Cimone, the highest peak in Italy's north-central Apennines, divides two distinct climati... more Mt. Cimone, the highest peak in Italy's north-central Apennines, divides two distinct climatic regions: the continentally temperate Po Valley to the north and the Mediterranean Basin to the south. It is considered a nonpolluted site, and the Italian Meteorological Service Observatory atop it, which is part of the WMO BAPMoN for the measurement of CO2, turbidity, and suspended particulate matter,
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Tropospheric ozone is a global air pollutant, a key species controlling the oxidazing capacity of... more Tropospheric ozone is a global air pollutant, a key species controlling the oxidazing capacity of the troposphere and an important greenhouse gas. For these reasons and with the aim to better characterise the background conditions of the Mediterranean basin/South Europe free troposphere, since 1996 continuous measurement of tropospheric "surface" ozone have been carried out at the Mt. Cimone GAW-WMO station
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Heart and Vessels, 2015
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Journal of Cardiovascular Medicine, 2013
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The mysterious star system epsilon Aurigae undergoes an eclipse every 27.1 years that lasts nearl... more The mysterious star system epsilon Aurigae undergoes an eclipse every 27.1 years that lasts nearly two years. The most recent eclipse started during the late summer of 2009. An international campaign for observing this eclipse was created in 2006, with a web site for information and, to-date, 17 periodic newsletters for details, as well as a Yahoo forum List for
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Lung Cancer, 2009
The present study analyses, long-term lung cancer survival rate in the Niguarda heart transplant ... more The present study analyses, long-term lung cancer survival rate in the Niguarda heart transplant population and the results of surgical treatments. From November 1985 to December 2006, 786 heart transplants were performed in our Center; we underwent a retrospective review of patients developing primary lung cancer. Among 660 heart transplant recipients valuable in this study, 22 (3.3%) developed a primary lung cancer (20 male, 91%), their mean age at time of heart transplant was 54.5+/-5.2 years (range, 42-65). The mean time from transplantation to lung cancer diagnosis was 73.7+/-30 months. Eleven patients (50%) were in stage IIIB or higher at the time of presentation. The 5-year survival rate of the entire study population was 21.4%, with a median survival time (MST) of 10.1 months. Ten patients underwent surgical resection (9 lobectomies and 1 wedge resection) and demonstrated improved long-term survival with 5-year survival of 56% and MST 70.4 months, compared to patients who did not undergo any surgical procedure, all of whom died during follow-up, with 1-year survival of 33%. Long-term results following lung cancer surgery in heart transplant recipients are satisfactory when performed at the early stage of the disease. Preventive computed tomography screen should be considered as a routine method for early diagnosis in this group of high-risk patients.
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Atmospheric Ozone, 1993
ABSTRACT Troposphere ozone concentration has been monitored since March 1991 at the Mt. Cimone Ob... more ABSTRACT Troposphere ozone concentration has been monitored since March 1991 at the Mt. Cimone Observatory (44 degree(s)12' N, 10 degree(s)42' E, 2165 m asl), a mountain site far from sources of anthropogenic pollution. The yearly trends of surface ozone concentration clearly evince a variation marked by peaks in spring and summer. That no ozone diurnal variations are usually found in late autumn, winter and early spring means that Mt. Cimone can be considered a baseline station over this period. In the warmer months, the daily ozone variation is affected by local mixing with the upwelling of ozone-poor low tropospheric air over the mid-daytime hours. Screening out the latter values, as well as those induced by horizontal transport phenomena from the pollutant-rich Po valley lowlands, yields free tropospheric ozone concentrations.
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Air Pollution and Visibility Measurements, 1995
ABSTRACT Mt. Cimone, the highest peak in Italy's north-central Apennines, divides two dis... more ABSTRACT Mt. Cimone, the highest peak in Italy's north-central Apennines, divides two distinct climatic regions: the continentally temperate Po Valley to the north and the Mediterranean Basin to the south. It is considered a nonpolluted site, and the Italian Meteorological Service Observatory atop it, which is part of the WMO BAPMoN for the measurement of CO2, turbidity, and suspended particulate matter, has been continuously monitoring surface ozone since March 1991 together with the FISBAT Insititute. The present, preliminary study of ozone transport episodes indicates that the air masses reaching Mt. Cimone exhibit low surface-ozone concentrations under certain weather conditions, i.e. the arrival of dust-laden air from the Sahara area or in concomitance with particular low-pressure systems.
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Global and Planetary Change, 2007
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Earth and Planetary Science Letters, 2001
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Atmospheric Environment, 2000
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Atmospheric Environment, 2000
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Atmospheric Chemistry and Physics, 2004
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Applied Optics, 2006
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Carbon dioxide (CO2) and tropospheric ozone (O3) play important roles in determining the radiativ... more Carbon dioxide (CO2) and tropospheric ozone (O3) play important roles in determining the radiative budget of the atmosphere. While CO2 is considered the most important anthropogenic greenhouse gas, O3 is evaluated as the third most powerful greenhouse gas since pre-industrial ages and, by influencing the lifetime of others greenhouse gases, it provides also an indirect impact on climate. Within the
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Italian Heart Journal Supplement Official Journal of the Italian Federation of Cardiology, Jun 1, 2003
We report our experience with echocardiography to guide the placement of a new left ventricular a... more We report our experience with echocardiography to guide the placement of a new left ventricular assist device, the Impella Recover 100, and to monitor its functioning. We monitored the introduction of 4 Impella Recover 100 devices in 2 patients by means of the transesophageal approach in the operating room, and thereafter we monitored the functioning of the devices by means of the multisection transthoracic approach in the intensive coronary care unit. The first Impella placement was performed in a patient as a "bridge" to heart transplantation, whereas the other three placements were performed in a patient as "recovery" for acute myocarditis. In all patients transesophageal echocardiography turned out to be a valuable tool to monitor the introduction and the perioperative hemodynamic management of the Impella device. In the early postoperative phase, transthoracic echocardiography allowed us to assess any pump displacement, and optimize biventricular function and adequate inotropic support. In conclusion, transthoracic and transesophageal echocardiography resulted in a valuable method for monitoring the correct placement and functioning of the left ventricular assist device Impella Recover 100.
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Italian Heart Journal Supplement Official Journal of the Italian Federation of Cardiology, Jun 1, 2004
The worsening evolution of patients undergoing surgical myocardial revascularization makes it dif... more The worsening evolution of patients undergoing surgical myocardial revascularization makes it difficult the stratification of the preoperative mortality risk, a correct evaluation of results and the comparison of results of different centers. The aim of the study was to evaluate the prognostic weight of comorbidity in surgical myocardial revascularization. We evaluated the characteristics of preoperative morbidity in 4999 patients who underwent surgical myocardial revascularization during four different periods (1979-1980, 1991-1992, 1994-1998, 1999-2002). We also evaluated the in-hospital results. By comparing the four different periods, an increase in older age, female sex, comorbidity, three-vessel disease, and severe left ventricular dysfunction was observed. Surgical mortality decreased to 2.3%. Multivariate analysis of the 1999-2002 period showed that only renal insufficiency was a risk factor for in-hospital mortality. Although the preoperative risk is higher, nowadays hospital mortality is reduced thanks to new cardiac-surgical techniques and approaches that increasing the capacity of controlling comorbidity in the pre-, intra- and postoperative course. For a correct decision-making process it is crucial to assess how much comorbidity may influence the long-term follow-up in these patients independently of surgical myocardial revascularization.
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The American Journal of Surgery, Jun 30, 2009
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Papers by Tiziano Colombo