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Alaklabi AM, Abdul Rab S, Sabbah BN, Maklad AE, Dokollari A, Van den Eynde J, Pompeu Sa M, Arjomandi Rad A, Ahsan MR, Fatehi Hassanabad A. Innovations in Aortic Valve Replacement: A Comprehensive Overview of the Intuity Rapid Deployment Valve. Cardiol Rev 2024:00045415-990000000-00210. [PMID: 38334371 DOI: 10.1097/crd.0000000000000657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Rapid deployment/sutureless (RDS) valves have recently emerged as an innovative surgical solution, providing an alternative to traditional methods of surgical aortic valve replacement (SAVR) by eliminating the need for suture placement and tying. This innovation leads to a reduction in aortic crossclamp and cardiopulmonary bypass times, enhancing the efficiency of the procedure. Among the 2 available RDS valves, the Edwards Intuity valve in particular has been demonstrated to be a particularly promising substitute in the field of SAVR. The Intuity valve distinguishes itself from other RDS and conventional valves by yielding superior outcomes, such as a significant reduction in mortality, increase in the longevity of the valve, and a marked decrease in both mean and peak transvalvular pressure gradients. These benefits collectively contribute to its appeal as a favorable new solution. However, further investigation is needed to conclusively determine the long-term outcomes and safety of RDS valves. Nevertheless, the utilization of the Intuity valve presents an exciting solution to the existing limitations of conventional and minimally invasive SAVR, especially for patients afflicted with severe aortic stenosis.
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Affiliation(s)
| | - Saleha Abdul Rab
- From the College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | - Belal N Sabbah
- From the College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | | | - Aleksander Dokollari
- Section of Cardiac Surgery, St. Boniface Hospital, University of Manitoba, Winnipeg, Manitoba, Canada
| | | | - Michel Pompeu Sa
- Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, PA
- UPMC Heart and Vascular Institute, Pittsburgh, PA
| | | | - Muhammad Rauf Ahsan
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, University of Calgary, Calgary, Canada
| | - Ali Fatehi Hassanabad
- Section of Cardiac Surgery, Department of Cardiac Sciences, Libin Cardiovascular Institute, University of Calgary, Calgary, Canada
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Alaklabi AM, Gambeta E, Zamponi GW. Electrophysiological characterization of a Ca V3.1 calcium channel mutation linked to trigeminal neuralgia. Pflugers Arch 2023; 475:711-718. [PMID: 37010626 DOI: 10.1007/s00424-023-02808-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/25/2023] [Accepted: 03/29/2023] [Indexed: 04/04/2023]
Abstract
Trigeminal neuralgia is a rare and debilitating disorder that affects one or more branches of the trigeminal nerve, leading to severe pain attacks and a poor quality of life. It has been reported that the CaV3.1 T-type calcium channel may play an important role in trigeminal pain and a recent study identified a new missense mutation in the CACNA1G gene that encodes the pore forming α1 subunit of the CaV3.1 calcium channel. The mutation leads to a substitution of an Arginine (R) by a Glutamine (Q) at position 706 in the I-II linker region of the channel. Here, we used whole-cell voltage-clamp recordings to evaluate the biophysical properties of CaV3.1 wild-type and R706Q mutant channels expressed in tsA-201 cells. Our data indicate an increase in current density in the R706Q mutant, leading to a gain-of-function effect, without changes in the voltage for half activation. Moreover, voltage clamp using an action potential waveform protocol revealed an increase in the tail current at the repolarization phase in the R706Q mutant. No changes were observed in the voltage-dependence of inactivation. However, the R706Q mutant displayed a faster recovery from inactivation. Hence, the gain-of-function effects in the R706Q CaV3.1 mutant have the propensity to impact pain transmission in the trigeminal system, consistent with a contribution to trigeminal neuralgia pathophysiology.
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Affiliation(s)
- Abdulaziz M Alaklabi
- Department of Clinical Neurosciences, Alberta Children's Hospital Research Institute and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
- College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | - Eder Gambeta
- Department of Clinical Neurosciences, Alberta Children's Hospital Research Institute and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada.
| | - Gerald W Zamponi
- Department of Clinical Neurosciences, Alberta Children's Hospital Research Institute and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
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