Search

BACKGROUND Transcatheter treatment techniques for tricuspid regurgitation (TR) have evolved in recent years, with leaflet repair being the most commonly used, but thus far evidence on the PASCAL and PASCAL Ace system is based mainly on compassionate use data. OBJECTIVES This is the first report on commercial use in a multicenter study with a large patient cohort investigating the safety and efficacy of the PASCAL and PASCAL Ace system in the treatment of TR. METHODS In a retrospective, multicenter, observational setting, data from all consecutive patients undergoing leaflet repair for TR at 8 centers was collected, including a centralized analysis of echocardiographic data. RESULTS A total of 235 high-risk patients (mean age 78 ± 8 years, 49% women, mean Society of Thoracic Surgeons Predicted Risk of Mortality score 8.6% ± 6.8%) were included. TR was functional in 87% of patients and graded severe or higher in 91%. TR was successfully reduced to moderate or less in 78% of patients (P < 0.001). Procedural success was 78% (n = 153). At the latest available follow-up (median 173 days), TR reduction was sustained (78% with TR moderate or less; P < 0.001), and echocardiography showed indications of right ventricular remodeling (mean right ventricular end-diastolic diameter 56 ± 9 mm vs 53 ± 9 mm; P < 0.001). Patients' symptoms diminished significantly (63% were in New York Heart Association functional class I or II at follow-up; P < 0.001). In a device-specific analysis, the PASCAL and PASCAL Ace showed no difference in TR reduction (postprocedural TR moderate or less in 77% vs 78%; P = 0.82). CONCLUSIONS In early clinical experience, the PASCAL (Ace) leaflet repair system has high technical and procedural success rates with efficient TR reduction and significant clinical and echocardiographic improvement at follow-up.

Recent trial results support catheter-based renal denervation (RDN) for treatment of hypertension, while the exact mechanisms causing blood pressure to fall remain incompletely understood. Cardiac magnetic resonance imaging was used to assess the effects of RDN on cardiac function in patients with hypertension undergoing RDN and compared with sham treatment. Cardiac magnetic resonance imaging was used to assess stroke volume index, cardiac index, heart rate, systemic vascular resistance index, and stroke work index from aortic flow measurements. Patients with resistant hypertension from a randomized, sham-controlled RDN trial underwent cardiac magnetic resonance imaging before RDN and at follow-up (randomized cohort). Results were then validated in a cohort of patients with resistant hypertension undergoing RDN and cardiac magnetic resonance imaging (validation cohort). In total, 162 patients were included 52 patients in the randomized trial (27 shams) and 110 patients in the validation cohort. In the randomized cohort, stroke volume index was reduced by 4.7±9.8 mL/m 2 in the RDN cohort and remained unchanged in the sham cohort ( P =0.008 for between-group comparison), while cardiac index and stroke work index tended to be reduced in RDN patients but not in sham patients (−0.10±5.9 versus 0.17±0.51 L/min per m 2 and −7.1±12.5 versus −1.4±10.4 g/m 2 , P =0.08 for both). In contrast, systemic vascular resistance index and heart rate remained unchanged after RDN. In the validation cohort, reduction of stroke volume index was confirmed, and cardiac index and stroke work index were also reduced significantly, whereas systemic vascular resistance index and heart rate remained unchanged at follow-up. In this study of patients with resistant hypertension, RDN resulted in a reduction of stroke volume when compared with sham.

Objective Chronic pulmonary regurgitation (PR) has deleterious effects on right ventricular (RV) function in repaired tetralogy of Fallot (ToF). However, there are little data regarding right ventricular outflow tract (RVOT) contractile dysfunction in response to chronic PR and on both RV and LV volumes and function. Methods We retrospectively identified consecutive patients with PR who were referred for magnetic resonance imaging quantification of "free PR" detected on echocardiography between 2003 and 2008. Patients had ToF and a transannular patch procedure (n = 30, 25.1 ± 1.2 years) or PR resulting from valvar pulmonary stenosis treated with surgical or percutaneous valvotomy (n = 30, 26.6 ± 1.8 years). Results The ToF and the PS groups were well matched for age at scan, age at repair surgery in ToF or initial valvotomy in PS, duration of exposure to PR, body surface area, heart rate, PR fraction, net forward pulmonary artery flow, and main and branch pulmonary artery dimensions. Severe PR fractions were identified in both groups (ToF: 40% ± 1% vs PS: 37% ± 2%, P = .2). Indexed RV and LV end-diastolic volumes were similar for both ToF and PS groups (RV end-diastolic volume index: 137 ± 6 mL/m 2 vs 128 ± 5 mL/m 2 , P = .2, and LV end-diastolic volume index: 72 ± 2 mL/m 2 vs 67 ± 2 mL/m 2 , P = .1, respectively). RV mass was also similar between groups (95 ± 5 g vs 81 ± 6 g, respectively, P = .08). However, indexed RV and LV end-systolic volumes were consistently higher in ToF when compared with PS (RV end-systolic volume index: 70 ± 5 mL/m 2 vs 54 ± 3 mL/m 2 , P 01, and LV end-systolic volume index: 29 ± 1 mL/m 2 vs 22 ± 1 mL/m 2 , P 01, respectively). These changes were reflected in lower biventricular systolic function in patients with ToF when compared with PS (RV ejection fraction: 52% ± 1.5% vs 59% ± 1%, P 001, and LV ejection fraction: 61% ± 1% vs 67 ± 1%, P 001, respectively). Although RV transannular plane systolic excursion was not significantly different between the groups ( P = .86), the RV outflow tract was considered contractile in only 50% of patients with ToF compared with 93% of patients with PS ( P = .0004). RV volumes and function were similar when only patients with contractile RV outflow tracts were compared. Conclusions RV outflow tract patch dysfunction in repaired ToF is responsible for higher end-systolic volumes and thus lower global measures of ventricular systolic function. These findings were not evident in cases of PS treated with valvotomy with comparable amount of PR. These observations highlight the importance of the initial repair surgery in ToF for late outcomes.

The purpose of this study was to compare ventricular volumes in patients with congenital heart disease measured by using (a) a cardiac gated sequence, (b) a standard real-time sequence, and (c) a radial real-time k-space and time (k-t) sensitivity encoding (SENSE) sequence.The local research ethics committee approved this study, and written consent was obtained from all participants. Of 40 patients with congenital heart disease, ventricular volumes were measured by using the three sequences. Global image quality and motion fidelity were scored and compared with a Wilcoxon signed rank test. Image contrast, edge sharpness, and summed perimeters (the total length of the endocardial tracings for a given ventricle at systole and diastole) were quantified and compared by using paired t tests. Ventricular volumes were compared with paired t tests, Bland-Altman analysis, and correlation coefficients.Global image quality, motion fidelity, image contrast, edge sharpness, and summed perimeters were all greater for radial real-time k-t SENSE imaging compared with standard real-time imaging (P.05). However, the gated acquisitions were significantly superior to radial real-time k-t SENSE (P.05). For cardiac gated versus radial k-t real-time acquisitions, there was no difference between right ventricular (RV) volumes and ejection fraction (EF) (P.15). There was a small difference in left ventricular (LV) end-diastolic volume (EDV) and thus, LV stroke volume and EF (P.05). For cardiac gated versus standard real-time acquisitions, both RV and LV EDV and thus, stroke volume and EF were significantly lower (P.05).Ventricular volumes and function can be accurately quantified by using radial k-t SENSE real-time imaging.