Nuestros investigadores

Pablo Ramos Ardanáz

Publicaciones científicas más recientes (desde 2010)

Autores: Ramos, P.; et al.
ISSN 0009-7322  Vol. 137  Nº 7  2018  págs. 743 - 746
Autores: Ramos, P.; et al.
ISSN 0009-7322  Vol. 138  Nº 4  2018  págs. 439 - 440
Autores: Ramos, P.; et al.
ISSN 1885-5857  Vol. 70  Nº 9  2017  págs. 706 - 712
INTRODUCTION AND OBJECTIVES: Rhythmia is a new nonfluoroscopic navigation system that is able to create high-density electroanatomic maps. The aim of this study was to describe the acute outcomes of atrial fibrillation (AF) ablation guided by this system, to analyze the volume provided by its electroanatomic map, and to describe its ability to locate pulmonary vein (PV) reconnection gaps in redo procedures. METHODS: This observational study included 62 patients who underwent AF ablation with Rhythmia compared with a retrospective cohort who underwent AF ablation with a conventional nonfluoroscopic navigation system (Ensite Velocity). RESULTS: The number of surface electrograms per map was significantly higher in Rhythmia procedures (12 125 ± 2826 vs 133 ± 21 with Velocity; P < .001), with no significant differences in the total procedure time. The Orion catheter was placed for mapping in 99.5% of PV (95.61% in the control group with a conventional circular mapping catheter; P = .04). There were no significant differences in the percentage of PV isolation between the 2 groups. In redo procedures, an ablation gap could be identified on the activation map in 67% of the reconnected PV (40% in the control group; P = .042). The measured left atrial volume was lower than that calculated by computed tomography (109.3 v 15.2 and 129.9 ± 13.2 mL, respectively; P < .001). There were no significant differences in the number of complications. CONCLUSIONS: The Rhythmia system is effective for AF ablation procedures, with procedure times and safety profiles similar to conventional nonfluoroscopic navigation systems. In redo procedures, it appears to be more effective in identifying reconnected PV conduction gaps.
Autores: Ramos, P.; et al.
ISSN 1885-5857  Vol. 70  Nº 7  2017  págs. 598 - 600
Autores: Ramos, P.; et al.
ISSN 0147-8389  Vol. 40  Nº 5  2017  págs. 545 - 550
BackgroundFirst description of a technique for left atrium transseptal puncture (TSP) with minimal radiation exposure by using the nonfluoroscopic MediGuide tracking system (MG; St. Jude Medical, St. Paul, MN, USA) without the assistance of intracardiac echocardiography. MethodsThis study included 31 consecutive patients with atrial fibrillation undergoing an MG-assisted percutaneous catheter ablation procedure. A Brockenbrough transseptal needle (BRK) is connected to a standard pressure transducer through a two-input valve. Then, an MG-enabled guidewire is inserted so that its tip exactly matches the BRK's distal tip. After the acquisition of two short radioscopic cine-loops we are able to trace the needle tip on the MG screen, performing the usual TSP maneuver but without fluoroscopy. Successful left atrium access is confirmed by noticing the change in the pressure curve and by advancing the guidewire into the left pulmonary veins. As a control group, 31 matched patients who underwent atrial fibrillation ablation with fluoroscopically guided, pressure-monitored TSP were included. ResultsSixty-two MG-assisted TSP attempts were performed; all but two were successfully accomplished without changing to the conventional technique (96.7%). The mean total fluoroscopy time, until the double transseptal access was performed, was 26.65 37.97 seconds in the MG group and 129.13 +/- 37.77 seconds in the conventional-TSP group (P < 0.001). No major complications occurred during any of the procedures. ConclusionThis new technique for TSP using MG is feasible and can be performed with minimal radiation exposure without the need for additional imaging techniques, achieving a significant reduction of fluoroscopy time.
Autores: Calvo, N; Ramos, P.; S; et al.
ISSN 1099-5129  Vol. 18  Nº 1  2016  págs. 57-63
A history of ¿2000 h of vigorous endurance training, tall stature, abdominal obesity, and OSA are frequently encountered as risk factors in patients with Ln-AF. Fewer than 2000 total hours of high-intensity endurance training associates with reduced Ln-AF risk.
Autores: N; V; m; et al.
ISSN 0300-2896  Vol. 52  Nº 1  2016  págs. 17-23
CPAP therapy only partially improves heart rate variability, and exclusively during waking hours, and reduces incidence of atrial tachycardia, both of which can influence cardiovascular morbidity and mortality in sleep apnea¿hypopnea syndrome patients.
Autores: Garcia-Bolao, I; Calvo, N; et al.
ISSN 1941-6911  Vol. 8  Nº 5  2016  págs. 61-66
Autores: Ramos, P.; c; m; et al.
ISSN 1465-9921  Vol. 15  2014  págs. 54
OSA induces selective atrial fibrosis in a chronic murine model, which can be mediated in part by the systemic and local inflammation and by decreased collagen-degradation. MSCs transplantation prevents atrial fibrosis, suggesting that these stem cells could counterbalance inflammation in OSA.
Autores: e; e; f; et al.
ISSN 2047-9980  Vol. 3  Nº 5  2014  págs. e000877
The linear block at the LA roof is not associated with an improved clinical outcome compared with PV isolation alone.
Autores: Calvo, N; f; e; et al.
ISSN 0167-5273  Vol. 168  Nº 4  2013  págs. 4093-7
The study groups included 659 consecutive patients undergoing CA between 2003 and 2011: TMP group (n = 61), HF group (n = 36) and control group (n = 562). Compared to controls, patients with TMP were younger, had a shorter AF course and more often had persistent AF. Regarding echocardiographic parameters, the TMP group had lower LVEF (40% vs. 62%, P < 0.05), larger left atrial diameter (LAD: 46 vs. 41 mm, P < 0.05) and LV end-diastolic diameter (LVEDD: 55 vs. 51 mm, P < 0.05) compared to controls, with significant improvement at six-month follow-up, including those patients with AF recurrence. The probability of being arrhythmia-free did not differ between the TMP group and the other groups after a first or last procedure. The only independent predictor of AF recurrence was LAD. CONCLUSIONS: Patients with tachycardiomyopathy secondary to AF benefit from CA, with a significant improvement in LVEF, LVEDD and LAD. The outcome after CA of this group did not differ from patients with no structural cardiomyopathy.