Risk of Dislodgement of Ultrathin Drug Eluting Stents Versus Thick Drug Eluting Stents.

Modern ultrathin struts drug eluting stents (DES), due to their constructive characteristics, might be more prone to stent dislodgment than the old thick DES. Our study is aimed to retrospectively analyze and compare the incidence and outcomes of stents dislodgment in thick (TSS) and ultrathin strut stents (USS).We retrospectively analyzed the procedural and medical data of 8,564 consecutive patients (mean age 64.3 ± 11.2 years old, 4442 males) who underwent percutaneous coronary intervention with DES implantation in our Institution between 1st January 2005 to 1st January 2020. Overall, 25,692 (mean of 3.2 stent for patients) have been implanted over the study period (10648 TSS and 15044 and USS, respectively). Stent dislodgment globally occurred in 0.56% of the implanted stents (0.28% vs 0.78%, p <0.001 for TTS and USS, respectively). Coronary artery calcifications, ostial lesion, coronary artery tortuosity, and a lesion length >25 mm were independent predictors of type I and II USS dislodgments. At 12 months follow up, the rate of target lesion failure was higher in the TTS group (30.7 vs 12.7 %, p <0.001). Stent dislodgement is unusual in the modern era but is more frequent using USS than TTS DES.

The QR-max index, a novel electrocardiographic index for the determination of left ventricular conduction delay and selection of cardiac resynchronization in patients with non-left bundle branch block.

Non-left bundle branch block (non-LBBB) remains an uncertain indication for cardiac resynchronization therapy (CRT). Non-LBBB includes right bundle branch block (RBBB) and non-specific LV conduction delay (NSCD), two different electrocardiogram (ECG) patterns which are not generally considered to be associated with LV conduction delay as judged by the invasive assessment of the Q-LV interval. We evaluated whether a novel ECG interval (QR-max index) correlated with the degree of LV conduction delay regardless of the type of non-LBBB ECG pattern, and could, therefore, predict CRT response. In 173 non-LBBB patients on CRT (92 NSCD, 81 RBBB), the QR-max index was measured as the maximum interval from QRS onset to R-wave offset in the limb leads. The correlation between QR-max index and Q-LV interval and the impact of the QR-max index on time to first heart failure hospitalization during 3-year follow-up were assessed. Q-LV correlated better with the QR-max index than with QRSd, particularly in the RBBB group (r = 0.91; p < 0.001 vs. r = 0.19; p < 0.089), while the correlations were r = 0.79 (p < 0.01) and r = 0.68 (p < 0.01), respectively, in the NSCD group. In both groups, the QR-max index was significantly more able than QRSd to identify CRT responders (AUC 0.825 vs. 0.576; p = 0.0008 in RBBB; AUC 0.738 vs. 0.701; p = 0.459 in NSCD). A QR-max index exceeding a cutoff value of 120 ms was associated with CRT response, with predictive values of 86.8 and 81.4% in RBBB and NSCD, respectively. The QR-max index reflects the degree of LV electrical delay regardless of QRS duration in RBBB and NSCD patients and is a useful indicator of suitability for CRT in non-LBBB patients.

Correlations between serum homocysteine levels and RoPE score in patients with patent foramen ovale.

The pathophysiological relationship between elevated serum homocysteine (Hcy) levels and patent foramen ovale (PFO) has not yet been completely clarified. In the present study, we assess the correlation between serum homocysteine levels and the RoPE score in PFO patients. We retrospectively reviewed clinical and instrumental data of 244 subjects referred to a single tertiary center for PFO evaluation and/or treatment between January 2010 and January 2018,stratified as closure and control group, respectively. Patients in the closure group had an higher serum Hcy levels compared to the control group (28.5 ± 8.5 vs 10.2 ± 6.6 µg/dL, p < 0.0001). A significant direct correlation was observed between serum Hcy levels and the RoPE Score in the entire population. A positive significant correlation continued to exist also in the closure and control groups (r = 0.472, p < 0.0001 and r = 0.378, p < 0.0001, respectively). A receiver operating characteristics curve identified the optimal cutoff value of homocysteinemia as a predictor of RoPE score > 7 in the closure group (AUC 0.90, 95% CI 0.81-0.94, p < 0.0001) when 19.5 µg/dL. Multivariate logistic regression analysis demonstrated that an Hcy serum level ≥ 19.5 µg/dL predict an RoPE score > 7 (OR 3.21, 95% CI 2.82-3.26, p < 0.0001) in closed patients independently from the presence of permanent right-to-left (RLS) (OR 2.28, 95% CI 2.01-2.43, p = 0.001) and atrial septal aneurysm (ASA) (OR 3.04, 95% CI 2.64-3.51, p < 0.0001). Serum homocysteine levels in PFO patients are positively correlated with the RoPE score. Moreover, a homocysteinemia ≥ 19.5 µg/dL predicts an RoPE score > 7 independently from the presence of a permanent RLS and a concomitant ASA.

TIMI Risk Index as a Predictor of 30-Day Outcomes in Patients With Acute Pulmonary Embolism.

BACKGROUND: Available studies have already identified age, heart rate (HR) and systolic blood pressure (SBP) as strong predictors of early mortality in acute pulmonary embolism (PE). MATERIAL AND METHODS: One-hundred-seventy patients, with acute PE confirmed on computed tomography angiography (CTA) were enrolled. Thrombolysis In Myocardial Infarction (TIMI) risk index (TRI) was calculated using the formula [heart rate (HR) x (AGE/102)/ systolic blood pressure (SBP)]. Study outcomes were 30-day mortality and/or clinical deterioration. RESULTS: Receiver operating characteristics (ROC) curve revealed that a TRI ≥45 was highly specific for both outcomes (AUC 0.91, 95% CI 0.83-0.98, p<0.0001) with a positive predictive value (PPV) and negative predictive value (NPV) of 8.3 and 96% for 30-day mortality while PPV and NPV for 30-day mortality and/or clinical deterioration were 21.1 and 98.2%, respectively. Multivariate regression analysis showed that TRI ≥45 was an independent predictor of 30-day mortality (O.R. 22.24, 95% CI 2.54-194.10, p=0.005) independently from positive cTnI and RVD (O.R. 9.57, 95% CI 1.88-48.78, p=0.007; OR 24.99, 95% CI 2.84-219.48, p=0.004). Similarly, 30-day mortality and/or clinical deterioration was predicted by TRI ≥45 (O.R. 11.57, 95% CI 2.36-56.63, p=0.003) and thrombolysis (3.83, 95% CI 1.04-14.09, p=0.043), independently from age, RVD and positive cTnI. Cox regression analysis confirmed the role of TRI as independent predictor for both outcomes. Mantel-Cox analysis showed that after 30-day follow-up there was a statistically significant difference in the distribution of survival between patients with and without TRI ≥45 [log rank (Mantel-Cox) chi-square 17.04, p<0.0001]. CONCLUSIONS: Thrombolysis In Myocardial Infarction (TIMI) risk index (TRI) predicted both 30-days mortality (all-causes) and/or clinical deterioration in patients with acute PE.

Ketamine and midazolam differently impact post-intubation hemodynamic profile when used as induction agents during emergency airway management in hemodynamically stable patients with ST elevation myocardial infarction.

We investigated the incidence of post-intubation hypotension (PIH) in hemodynamically stable patients with STEMI requiring rapid sequences intubation (RSI) and medicated with ketamine or midazolam as induction agent. STEMI patients admitted between 1st January 2009 and 1st January 2017 who did not receive any type of inotropic support before the endotracheal intubation (ETI) was reviewed. PIH was defined as a reduction greater than 20% or a drop of systolic blood pressure (SBP) below 90 mmHg within 10 min from the administration of the induction agent [ketamine (1 mg/kg) or midazolam (0.3 mg/kg)]. Over the study period, 136 patients (66 male and 70 females, mean age 72.25 ± 7.33 years) met the inclusion criteria. Patients treated with midazolam and ketamine were 63 and 73, respectively. PIH was observed in 38 (27.9%) patients after 10 min from ETI. Midazolam patients had a significant lower SBP at both 5 and 10 min after induction (97.75 ± 8.06 vs 100.81 ± 8.08, p = 0.029 and 92.83 ± 7.53 vs 101.58 ± 7.29, p < 0.0001, respectively) (ANOVA p < 0.0001). Age (OR 1.91, 95% CI 1.87-1.97, p = 0.001), history of arterial hypertension (OR 2.27, 95% CI 2.21-2.35, p = 0.0001), multivessel coronary artery disease (OR 2.66, 95% CI 2.58-2.71, p = 0.001), SI ≥0.9 (OR 2.41, 95% CI 2.36-2.48, p < 0.0001) and anterior STEMI (OR 2.51, 95% CI 2.48-2.57, p = 0.0001) resulted independent predictors of PIH in STEMI patients treated with midazolam, as induction agent, before ETI. Midazolam was more likely than ketamine to cause significant PIH when used as an induction agent for RSI in hemodynamically stable patients with STEMI.

Modified balloon aortic valvuloplasty in fragile symptomatic patients unsuitable for both surgical and percutaneous valve replacement.

BACKGROUND: Balloon Aortic valvuloplasty (BAV) is considered as a bridge therapy to percutaneous valve implantation or a palliative treatment in patients with aortic valve stenosis (AVS). Potential risk of complications, in particular in fragile patients, is still not negligible. AIM: To describe the technique and outcomes of modified BAV in fragile symptomatic patients unsuitable for other treatments using no-pacing and minimally invasive approach. METHODS: Symptomatic fragile patients with severe aortic valve stenosis judged unsuitable by the heart team for surgical or percutaneous valve implantation from 1 September 2013 to 1 September 2017 were offered modified BAV. Simplified procedural protocol included a 4F right radial artery access for gradient check, a 8F compatible undersized balloons, two partial inflations-trial before a full inflation with no-pace maker back-up, final pressure gradient recording and aortography. RESULTS: Thirty-four symptomatic fragile patients (mean age 80.9±4.9, range 73 to 91years, 100% Katz >6, mean Euroscore I 30.0±11.7%) underwent modified BAV in the last 5years with immediate success in all (100%). Mean aortic valve area increased from 0.58±0.2cm2 to 1.1±0.2cm2 (p<0.01) whereas mean peak gradient decreased from 75.6±11.3 to 35.8±11.2mmHg (p<0.01). Procedural complications were 14.7%. Thirty-day mortality was 11.8%. On a mean follow up of 38.4±4.6months four patients successfully repeated the procedure, while global mortality was 23.5% (8 patients). The other 22 patients maintained a NYHA class of 2.1±0.7. CONCLUSIONS: No-pacing minimally invasive BAV seems to have acceptable outcomes in patients with severe AVS and no other treatment options.

Air pollution and ST-elevation myocardial infarction treated with primary percutaneous coronary angioplasty: A direct correlation.

PURPOSE: The relationships between air pollutant concentration levels and admission for primary percutaneous coronary intervention (PCI) in patients with ST-elevation myocardial infarction (STEMI) have never been assessed. METHODS: We retrospectively reviewed 4 consecutive years of medical and instrumental data (1st January 2012 to 1st March 2016) to identify patients admitted with STEMI and subsequently treated with primary PCI in our third referral center. Daily atmospheric pressure data (in hectopascal [hPa]) and air pollutant concentration levels were obtained from the regional meteorological service which had a monitoring site in our city (Rovigo, Italy). Pollutants investigated were nitrogen dioxide (NO2), particulate matter ≤10µm (PM10), ozone (O3), sulfur dioxide (SO2) and carbon monoxide (CO). Safety air concentration levels for the air pollutants were also considered. RESULTS: PCI in STEMI patients was more frequent when AP was higher than 1013.15hPa (61.8% vs 38.2%, p<0.001). The incidences of STEMI patients when NO2, PM10 and O3 levels overcame the safe threshold were 83.1%, 52% and 8.5%, respectively. A positive correlation was found between the daily number of STEMI subsequently treated with primary PCI and the air pollutant levels of the same day for NO2 (r=0.205, p=0.001), PM10 (r=0.349, p<0.0001) and O3 (r=0.191, p=0.002). CONCLUSIONS: A direct and significant correlation exists between the number of daily STEMI patients and the NO2, PM10 and O3 air concentration levels of the same day.

Silent large vegetative mitral-aortic enterococcal endocarditis.

: In spite of the evolution of diagnostic and imaging tools, infective endocarditis still remains a challenging diagnostic problem. We report the case of a 77-year-old heart failure patient with a very large mitral vegetative lesion but without fever or any other clinical or microbiological 'endocarditis criteria' except the echocardiographic findings. In this scenario, the second more likely differential diagnosis was neoformation of the mitral valve but despite an exhaustive preoperative diagnostic cardiac imaging, this hypothesis could not be excluded before surgical excision and microbiological examination of the surgical specimen.

Optimization of left ventricular pacing site plus multipoint pacing improves remodeling and clinical response to cardiac resynchronization therapy at 1 year.

BACKGROUND: Approximately one-third of the patients with heart failure (HF) treated with cardiac resynchronization therapy (CRT) fail to respond. Positioning the left ventricular (LV) pacing lead in the area of the latest electrical delay may improve the response to CRT. Multipoint pacing (MPP) of the LV has been shown to improve the acute hemodynamic response. OBJECTIVE: The purpose of this study was to test the hypothesis that patients treated with MPP in whom LV pacing location is optimized have better long-term clinical outcomes than do patients treated with conventional CRT. METHODS: We evaluated the echocardiographic and clinical response of 110 patients with HF treated for nearly 1 year with either conventional CRT (standard [STD] group, n = 54, 49%), CRT with hemodynamic and electrical optimization of the LV pacing site (optimized [OPT] group, n = 36, 33%), or OPT combined with MPP (OPT + MPP group, n = 20, 18%). Responders were classified in terms of reduction in end-systolic volume index ≥15%, reduction in New York Heart Association (NYHA) class ≥1, and Packer score variation (NYHA response with no HF-related hospitalization events or death). RESULTS: In STD, OPT, and OPT + MPP groups, 56%, 72%, and 90% of patients, respectively, were end-systolic volume index responders (P = .004) and 67%, 78%, and 95% were NYHA class responders (P = .012); 59%, 67%, and 90% of patients exhibited a 1-year Packer score of 0 (P = .018). These trends remained significant after adjustment for confounding factors by multivariate logistic analysis. CONCLUSION: Combining MPP with optimal positioning of the LV lead on the basis of electrical delay and hemodynamics enhances reverse remodeling and improves clinical outcomes beyond the effect due to conventional CRT.

Basic Properties And Clinical Applications Of The Intracardiac.

The electric signals detected by intracardiac electrodes provide information on the occurrence and timing of myocardial depolarization, but are not generally helpful to characterize the nature and origin of the sensed event. A novel recording technique referred to as intracardiac ECG (iECG) has overcome this limitation. The iECG is a multipolar signal, which combines the input from both atrial and ventricular electrodes of a dual-chamber pacing system in order to assess the global electric activity of the heart. The tracing resembles a surface ECG lead, featuring P, QRS and T waves. The time-course of the waveform representing ventricular depolarization (iQRS) does correspond to the time-course of the surface QRS with any ventricular activation modality. Morphological variants of the iQRS waveform are specifically associated with each activity pattern, which can therefore be diagnosed by evaluation of the iECG tracing. In the event of tachycardia, SVTs with narrow QRS can be distinguished from other arrhythmia forms based upon the preservation of the same iQRS waveform recorded in sinus rhythm. In ventricular capture surveillance, real pacing failure can be reliably discriminated from fusion beats by the analysis of the area delimited by the iQRS signal. Assessing the iQRS waveform correspondence with a reference template could be a way to check the effectiveness of biventricular pacing, and to discriminate myocardial capture alone from additional His bundle recruitment in para-Hisian stimulation. The iECG is not intended as an alternative to conventional intracavitary sensing, which remains the only tool suitable to drive the sensing function of a pacing device. Nevertheless, this new electric signal can add the benefits of morphological data processing, which might have important implications on the quality of the pacing therapy.

Transmetallation as an effective strategy for the preparation of bimetallic CoPd and CuPd nanoparticles.

The preparation of palladium alloy nanoparticles is of great interest for many applications, especially in catalysis. Starting from presynthesized nanoparticles of a less noble metal, a transmetallation reaction involving a redox process at the nanoparticle surface can be exploited to modify the nanoparticle composition and crystalline phase. As an example, monodispersed ε-cobalt and face-centered cubic copper nanoparticles were synthesized in organic solvents at high temperature and the as-formed nanoparticles were reacted with palladium(ii) hexafluoroacetylacetonate resulting in the formation of alloyed nanoparticles whose composition closely follows the reactant ratio. The oxidative state of the nanoparticle surface greatly affects the success of the transmetallation reaction and a reduction treatment was necessary to achieve the desired final product. Electron microscopy and X-ray diffraction showed that for cobalt a limiting palladium content for the ε-phase alloy is found, above which an fcc alloy nucleates, while for copper the fcc crystalline phase is preserved throughout the whole composition range.

Acute pulmonary embolism: external validation of an integrated risk stratification model.

BACKGROUND: In hemodynamically stable patients with acute pulmonary embolism, risk stratification is essential to drive clinical management. In these patients, risk stratification for in-hospital adverse outcomes based on markers of right ventricular dysfunction and injury has been proposed. METHODS: The aim of this study was to validate a model based on the incremental prognostic value of right ventricular dysfunction and injury in hemodynamically stable patients with acute pulmonary embolism. Patients from the prospective Italian Pulmonary Embolism Registry were included in the study. Study outcomes were in-hospital death and the composite of in-hospital death or clinical deterioration. RESULTS: Among 1,515 hemodynamically stable patients, 869 had both echocardiography and troponin assessments. The risk for in-hospital death or clinical deterioration was higher in patients with right ventricular dysfunction and elevated troponin level (8.8%; hazard ratio [HR], 14.2 [95% CI, 1.94-104.16]; P < .01) and with either right ventricular dysfunction or elevated troponin level (4.7%; HR, 7.9 [95% CI, 1.1-59.9]; P < .05) compared with patients without dysfunction and normal troponin levels. The negative predictive value of the model was 100% for in-hospital death and 99% for death or clinical deterioration. C statistics showed an improvement of the discriminatory power for in-hospital death or clinical deterioration by using the overall model (0.66; 95% CI, 0.60-0.73) over either echocardiography (0.59; 95% CI, 0.53-0.67) or troponin level (0.61; 95% CI, 0.53-0.69) alone. CONCLUSIONS: A model that includes both dysfunction and injury of the right ventricle has an incremental prognostic value for risk stratification in hemodynamically stable patients with acute pulmonary embolism. Patients with no dysfunction or injury have a favorable outcome. TRIAL REGISTRY: ClinicalTrials.gov; No.: NCT01604538; URL: www.clinicaltrials.gov.

Aortic stiffness: an old concept for new insights into the pathophysiology of functional mitral regurgitation.

Functional mitral regurgitation (FMR) is thought to be linked with ventricular afterload. However, the relation between aortic stiffness, which is a main determinant of ventricular afterload, and quantitatively assessed mitral regurgitation is unknown. A total of 175 patients (age 61 ± 13; 85 % male) with left ventricular (LV) systolic dysfunction were studied consecutively. Left ventricular volumes, ejection fraction, and LV outflow tract stroke volume were measured. Aortic pulse wave velocity (PWV), a known marker of aortic stiffness, was determined using Doppler flow recordings as the distance (d) traveled by the pulse wave, measured over the body surface as the distance between the two recording sites, divided by the time (t) taken by the pulse wave to travel from the descending aorta to the abdominal aorta. Mitral effective regurgitant orifice (ERO), regurgitant volume (RV), and fraction (RF) were measured using the proximal isovelocity surface area method. The mean PWV was 6.0 ± 3.5 m/s (range 2.6-25). PWV was significantly associated with ERO (r = 0.35; p < 0.0001), RV (r = 0.36; p < 0.0001) RF (p = 0.41; p < 0.0001). The association of PWV with each variable of mitral regurgitation was independent of LV volume, cardiac output, and systemic vascular resistance. Aortic stiffness is an important determinant of the severity of FMR. Aortic stiffness should be considered an important therapeutic target in patients with LV dysfunction in order to ameliorate both LV systolic and diastolic function and mitral regurgitation.