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Ren F, Sui Y, Gong X, Xing Q, Wang Z. High-Intensity Focused Ultrasound in Interventricular Septal Myocardial Ablation. Int Heart J 2022; 63:1158-1165. [DOI: 10.1536/ihj.22-162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Fei Ren
- Qingdao Women and Children's Hospital, Cheeloo College of Medicine, Shandong University
| | - Yulong Sui
- Qingdao Women and Children's Hospital, Qingdao University
| | - Xiaobo Gong
- National State Key Laboratory of Ultrasound in Medicine and Engineering, College of Biomedical Engineering, Chongqing Medical University
| | - Quansheng Xing
- Qingdao Women and Children's Hospital, Cheeloo College of Medicine, Shandong University
| | - Zhibiao Wang
- National State Key Laboratory of Ultrasound in Medicine and Engineering, College of Biomedical Engineering, Chongqing Medical University
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2
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Habibi M, Berger RD, Calkins H. Radiofrequency ablation: technological trends, challenges, and opportunities. Europace 2021; 23:511-519. [PMID: 33253390 DOI: 10.1093/europace/euaa328] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 10/04/2020] [Indexed: 12/15/2022] Open
Abstract
More than three decades have passed since utilization of radiofrequency (RF) ablation in the treatment of cardiac arrhythmias. Although several limitations and challenges still exist, with improvements in catheter designs and delivery of energy the way we do RF ablation now is much safer and more efficient. This review article aims to give an overview on historical advances on RF ablation and challenges in performing safe and efficient ablation.
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Affiliation(s)
- Mohammadali Habibi
- Division of Cardiology, Section for Cardiac Electrophysiology, The Johns Hopkins University, 1800 Orleans Street, Sheikh Zayed Tower 7125R, Baltimore, MD 21287, USA
| | - Ronald D Berger
- Division of Cardiology, Section for Cardiac Electrophysiology, The Johns Hopkins University, 1800 Orleans Street, Sheikh Zayed Tower 7125R, Baltimore, MD 21287, USA
| | - Hugh Calkins
- Division of Cardiology, Section for Cardiac Electrophysiology, The Johns Hopkins University, 1800 Orleans Street, Sheikh Zayed Tower 7125R, Baltimore, MD 21287, USA
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3
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Karunakaran CP, Burgess MT, Rao MB, Holland CK, Mast TD. Effect of Overpressure on Acoustic Emissions and Treated Tissue Histology in ex Vivo Bulk Ultrasound Ablation. ULTRASOUND IN MEDICINE & BIOLOGY 2021; 47:2360-2376. [PMID: 34023187 PMCID: PMC8243850 DOI: 10.1016/j.ultrasmedbio.2021.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 04/08/2021] [Accepted: 04/11/2021] [Indexed: 06/12/2023]
Abstract
Bulk ultrasound ablation is a thermal therapy approach in which tissue is heated by unfocused or weakly focused sonication (average intensities on the order of 100 W/cm2) to achieve coagulative necrosis within a few minutes exposure time. Assessing the role of bubble activity, including acoustic cavitation and tissue vaporization, in bulk ultrasound ablation may help in making bulk ultrasound ablation safer and more effective for clinical applications. Here, two series of ex vivo ablation trials were conducted to investigate the role of bubble activity and tissue vaporization in bulk ultrasound ablation. Fresh bovine liver tissue was ablated with unfocused, continuous-wave ultrasound using ultrasound image-ablate arrays sonicating at 31 W/cm2 (0.9 MPa amplitude) for either 20 min at a frequency of 3.1 MHz or 10 min at 4.8 MHz. Tissue specimens were maintained at a static overpressure of either 0.52 or 1.2 MPa to suppress bubble activity and tissue vaporization or at atmospheric pressure for control groups. A passive cavitation detector was used to record subharmonic (1.55 or 2.4 MHz), broadband (1.2-1.5 MHz) and low-frequency (5-20 kHz) acoustic emissions. Treated tissue was stained with 2% triphenyl tetrazolium chloride to evaluate thermal lesion dimensions. Subharmonic emissions were significantly reduced in overpressure groups compared with control groups. Correlations observed between acoustic emissions and lesion dimensions were significant and positive for the 3.1-MHz series, but significant and negative for the 4.8-MHz series. The results indicate that for bulk ultrasound ablation, where both acoustic cavitation and tissue vaporization are possible, bubble activity can enhance ablation in the absence of tissue vaporization, but can reduce thermal lesion dimensions in the presence of vaporization.
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Affiliation(s)
| | - Mark T Burgess
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, USA
| | - Marepalli B Rao
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, USA; Department of Environmental Health, University of Cincinnati, Cincinnati, Ohio, USA
| | - Christy K Holland
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, USA; Department of Internal Medicine, Division of Cardiovascular Health and Disease, University of Cincinnati, Cincinnati, Ohio, USA
| | - T Douglas Mast
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, USA; Department of Internal Medicine, Division of Cardiovascular Health and Disease, University of Cincinnati, Cincinnati, Ohio, USA.
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4
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Tang Y, Chen LY, Zhang A, Liao CP, Gross ME, Kim ES. In Vivo Non-Thermal, Selective Cancer Treatment With High-Frequency Medium-Intensity Focused Ultrasound. IEEE ACCESS : PRACTICAL INNOVATIONS, OPEN SOLUTIONS 2021; 9:122051-122066. [PMID: 35321234 PMCID: PMC8939762 DOI: 10.1109/access.2021.3108548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Focused ultrasound (FUS) has proven its efficacy in non-invasive, radiation-free cancer treatment. However, the commonly used low-frequency high-intensity focused ultrasound (HIFU) destroys both cancerous and healthy tissues non-specifically through extreme heat and inertial cavitation with low spatial resolution. To address this issue, we evaluate the therapeutic effects of pulsed (60 Hz pulse repetition frequency, 1.45 ms pulse width) high-frequency (20.7 MHz) medium-intensity (spatial-peak pulse-average intensity ISPPA < 279.1 W/cm2, spatial-peak temporal-average intensity ISPTA < 24.3 W/cm2) focused ultrasound (pHFMIFU) for selective cancer treatment without thermal damage and with low risk of inertial cavitation (mechanical index < 0.66), in an in vivo subcutaneous B16F10 melanoma tumor growth model in mice. The pHFMIFU with 104 μm focal diameter is generated by a microfabricated self-focusing acoustic transducer (SFAT) with a Fresnel acoustic lens. A three-axis positioning system has been developed for automatic scanning of the transducer to cover a larger treatment volume, while a water-cooling system is custom-built for dissipating non-acoustic heat from the transducer surface. Initial testing revealed that pHFMIFU treatment can be applied to a living animal while maintaining skin temperature under 35.6 °C without damaging normal skin and tissue. After eleven days of treatment with pHFMIFU, the treated tumors were significantly smaller with large areas of necrosis and apoptosis in the treatment field compared to untreated controls. Potential mechanisms of this selective, non-thermal killing effect, as well as possible causes of and solutions to the variation in treatment results, have been analyzed and proposed. The pHFMIFU could potentially be used as a new therapeutic modality for safer cancer treatment especially in critical body regions, due to its cancer-specific effects and high spatial resolution.
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Affiliation(s)
- Yongkui Tang
- Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA 90089, USA
| | - Leng-Ying Chen
- Lawrence J. Ellison Institute for Transformative Medicine, University of Southern California, Los Angeles, CA 90064, USA
| | - Ailin Zhang
- Lawrence J. Ellison Institute for Transformative Medicine, University of Southern California, Los Angeles, CA 90064, USA
| | - Chun-Peng Liao
- Lawrence J. Ellison Institute for Transformative Medicine, University of Southern California, Los Angeles, CA 90064, USA
| | - Mitchell Eric Gross
- Lawrence J. Ellison Institute for Transformative Medicine, University of Southern California, Los Angeles, CA 90064, USA
| | - Eun Sok Kim
- Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA 90089, USA
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5
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Zheng X, Liao Q, Wang Y, Li H, Wang X, Wang Y, Wu W, Wang J, Xiao L, Huang J. Ultrasound: The Potential Power for Cardiovascular Disease Therapy. CARDIOVASCULAR INNOVATIONS AND APPLICATIONS 2019. [DOI: 10.15212/cvia.2019.0013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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6
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Prediction of HIFU Propagation in a Dispersive Medium via Khokhlov–Zabolotskaya–Kuznetsov Model Combined with a Fractional Order Derivative. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8040609] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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7
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Lü F, Huang W, Benditt DG. A feasibility study of noninvasive ablation of ventricular tachycardia using high-intensity focused ultrasound. J Cardiovasc Electrophysiol 2018; 29:788-794. [PMID: 29431260 DOI: 10.1111/jce.13459] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 11/07/2017] [Accepted: 01/25/2018] [Indexed: 12/27/2022]
Abstract
BACKGROUND Current transcatheter ablation of ventricular tachycardia (VT) techniques is limited in part by its invasive nature and superficial depth of ablation lesions. OBJECTIVES This study was aimed at evaluating the feasibility of targeted ablation of cardiac tissues using high-intensity focused ultrasound (HIFU) as a potential means for noninvasive ablation of VT. METHODS Ablation of ventricular myocardium was performed in anesthetized closed-chest dogs using a HIFU therapeutic system that is currently used clinically for ablation of human solid tumors. Ventricular pacing using a bipolar catheter was performed at a rate slightly higher than intrinsic sinus rate to mimic VT. The myocardium at the tip of the pacing catheter was targeted for ablation. Ablation endpoint was loss of ventricular capture first and confirmed by electrical nonexcitation with 10-mA, 2-ms pulse-width unipolar stimulation. RESULTS Optimal ablation energy was identified at 400 W for 2-4 seconds. In five separate experimental preparations, pacing could be terminated successfully during HIFU energy delivery, which was further confirmed by electrical nonexcitation. However, capture could be obtained at other nonablated locations using the same pacing catheter. Both transmural and localized lesions could be created in a controlled fashion without apparent injury to skin, lung, or pericardium on postmortem examination. CONCLUSION This pilot study suggests that HIFU is potentially useful for noninvasive ablation of targeted, localized myocardial tissues, and it may be potentially applicable for VT ablation, particularly for those with intramyocardial/epicardial origins.
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Affiliation(s)
- Fei Lü
- Deborah Heart and Lung Center, Browns Mills, New Jersey, USA
| | - Wei Huang
- Chongqing Medical University, Chongqing, China
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8
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Arora JS, Murad HY, Ashe S, Halliburton G, Yu H, He J, John VT, Khismatullin DB. Ablative Focused Ultrasound Synergistically Enhances Thermally Triggered Chemotherapy for Prostate Cancer in Vitro. Mol Pharm 2016; 13:3080-90. [PMID: 27383214 DOI: 10.1021/acs.molpharmaceut.6b00216] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
High-intensity focused ultrasound (HIFU) can locally ablate biological tissues such as tumors, i.e., induce their rapid heating and coagulative necrosis without causing damage to surrounding healthy structures. It is widely used in clinical practice for minimally invasive treatment of prostate cancer. Nonablative, low-power HIFU was established as a promising tool for triggering the release of chemotherapeutic drugs from temperature-sensitive liposomes (TSLs). In this study, we combine ablative HIFU and thermally triggered chemotherapy to address the lack of safe and effective treatment options for elderly patients with high-risk localized prostate cancer. DU145 prostate cancer cells were exposed to chemotherapy (free and liposomal Sorafenib) and ablative HIFU, alone or in combination. Prior to cell viability assessment by trypan blue exclusion and flow cytometry, the uptake of TSLs by DU145 cells was verified by confocal microscopy and cryogenic scanning electron microscopy (cryo-SEM). The combination of TSLs encapsulating 10 μM Sorafenib and 8.7W HIFU resulted in a viability of less than 10% at 72 h post-treatment, which was significant less than the viability of the cells treated with free Sorafenib (76%), Sorafenib-loaded TSLs (63%), or HIFU alone (44%). This synergy was not observed on cells treated with Sorafenib-loaded nontemperature sensitive liposomes and HIFU. According to cryo-SEM analysis, cells exposed to ablative HIFU exhibited significant mechanical disruption. Water bath immersion experiments also showed an important role of mechanical effects in the synergistic enhancement of TSL-mediated chemotherapy by ablative HIFU. This combination therapy can be an effective strategy for treatment of geriatric prostate cancer patients.
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Affiliation(s)
- Jaspreet S Arora
- Department of Chemical and Biomolecular Engineering, Tulane University , New Orleans, Louisiana 70118, United States.,Vector-Borne Infectious Disease Research Center, Tulane University , New Orleans, Louisiana 70118, United States
| | - Hakm Y Murad
- Department of Biomedical Engineering, Tulane University , New Orleans, Louisiana 70118, United States.,Tulane Institute for Integrative Engineering for Health and Medicine, Tulane University , New Orleans, Louisiana 70118, United States
| | - Stephen Ashe
- Department of Chemical and Biomolecular Engineering, Tulane University , New Orleans, Louisiana 70118, United States
| | - Gray Halliburton
- Department of Biomedical Engineering, Tulane University , New Orleans, Louisiana 70118, United States.,Tulane Institute for Integrative Engineering for Health and Medicine, Tulane University , New Orleans, Louisiana 70118, United States
| | - Heng Yu
- Department of Biomedical Engineering, Tulane University , New Orleans, Louisiana 70118, United States.,Tulane Institute for Integrative Engineering for Health and Medicine, Tulane University , New Orleans, Louisiana 70118, United States
| | - Jibao He
- Department of Chemical and Biomolecular Engineering, Tulane University , New Orleans, Louisiana 70118, United States
| | - Vijay T John
- Department of Chemical and Biomolecular Engineering, Tulane University , New Orleans, Louisiana 70118, United States.,Vector-Borne Infectious Disease Research Center, Tulane University , New Orleans, Louisiana 70118, United States
| | - Damir B Khismatullin
- Department of Biomedical Engineering, Tulane University , New Orleans, Louisiana 70118, United States.,Tulane Institute for Integrative Engineering for Health and Medicine, Tulane University , New Orleans, Louisiana 70118, United States.,Tulane Cancer Center, Tulane University School of Medicine , New Orleans, Louisiana 70118, United States
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9
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Hooks DA, Berte B, Yamashita S, Mahida S, Sellal JM, Aljefairi N, Frontera A, Derval N, Denis A, Hocini M, Haïssaguerre M, Jaïs P, Sacher F. New strategies for ventricular tachycardia and ventricular fibrillation ablation. Expert Rev Cardiovasc Ther 2015; 13:263-76. [DOI: 10.1586/14779072.2015.1009039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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10
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Wu Z, Kumon RE, Laughner JI, Efimov IR, Deng CX. Electrophysiological changes correlated with temperature increases induced by high-intensity focused ultrasound ablation. ULTRASOUND IN MEDICINE & BIOLOGY 2015; 41:432-448. [PMID: 25516446 PMCID: PMC4297512 DOI: 10.1016/j.ultrasmedbio.2014.09.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 08/30/2014] [Accepted: 09/04/2014] [Indexed: 06/04/2023]
Abstract
To gain better understanding of the detailed mechanisms of high-intensity focused ultrasound (HIFU) ablation for cardiac arrhythmias, we investigated how the cellular electrophysiological (EP) changes were correlated with temperature increases and thermal dose (cumulative equivalent minutes [CEM43]) during HIFU application using Langendorff-perfused rabbit hearts. Employing voltage-sensitive dye di-4-ANEPPS, we measured the EP and temperature during HIFU using simultaneous optical mapping and infrared imaging. Both action potential amplitude (APA) and action potential duration at 50% repolarization (APD50) decreased with temperature increases, and APD50 was more thermally sensitive than APA. EP and tissue changes were irreversible when HIFU-induced temperature increased above 52.3 ± 1.4°C and log10(CEM43) above 2.16 ± 0.51 (n = 5), but were reversible when temperature was below 50.1 ± 0.8°C and log10(CEM43) below -0.9 ± 0.3 (n = 9). EP and temperature/thermal dose changes were spatially correlated with HIFU-induced tissue necrosis surrounded by a transition zone.
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Affiliation(s)
- Ziqi Wu
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Ronald E Kumon
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Jacob I Laughner
- Department of Biomedical Engineering, Washington University at Saint Louis, MO, USA
| | - Igor R Efimov
- Department of Biomedical Engineering, Washington University at Saint Louis, MO, USA
| | - Cheri X Deng
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA.
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11
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Hoang NH, Murad HY, Ratnayaka SH, Chen C, Khismatullin DB. Synergistic ablation of liver tissue and liver cancer cells with high-intensity focused ultrasound and ethanol. ULTRASOUND IN MEDICINE & BIOLOGY 2014; 40:1869-1881. [PMID: 24798386 DOI: 10.1016/j.ultrasmedbio.2014.02.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Revised: 02/03/2014] [Accepted: 02/20/2014] [Indexed: 06/03/2023]
Abstract
We investigated the combined effect of ethanol and high-intensity focused ultrasound (HIFU), first, on heating and cavitation bubble activity in tissue-mimicking phantoms and porcine liver tissues and, second, on the viability of HepG2 liver cancer cells. Phantoms or porcine tissues were injected with ethanol and then subjected to HIFU at acoustic power ranging from 1.2 to 20.5 W (HIFU levels 1-7). Cavitation events and the temperature around the focal zone were measured with a passive cavitation detector and embedded type K thermocouples, respectively. HepG2 cells were subjected to 4% ethanol solution in growth medium (v/v) just before the cells were exposed to HIFU at 2.7, 8.7 or 12.0 W for 30 s. Cell viability was measured 2, 24 and 72 h post-treatment. The results indicate that ethanol and HIFU have a synergistic effect on liver cancer ablation as manifested by greater temperature rise and lesion volume in liver tissues and reduced viability of liver cancer cells. This effect is likely caused by reduction of the cavitation threshold in the presence of ethanol and the increased rate of ethanol diffusion through the cell membrane caused by HIFU-induced streaming, sonoporation and heating.
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Affiliation(s)
- Nguyen H Hoang
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
| | - Hakm Y Murad
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
| | - Sithira H Ratnayaka
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
| | - Chong Chen
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
| | - Damir B Khismatullin
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA.
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12
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Bourke T, Buch E, Mathuria N, Michowitz Y, Yu R, Mandapati R, Shivkumar K, Tung R. Biophysical parameters during radiofrequency catheter ablation of scar-mediated ventricular tachycardia: epicardial and endocardial applications via manual and magnetic navigation. J Cardiovasc Electrophysiol 2014; 25:1165-73. [PMID: 24946895 DOI: 10.1111/jce.12477] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Accepted: 05/28/2014] [Indexed: 11/30/2022]
Abstract
BACKGROUND There is a paucity of data on biophysical parameters during radiofrequency ablation of scar-mediated ventricular tachycardia (VT). METHODS AND RESULTS Data were collected from consecutive patients undergoing VT ablation with open-irrigation. Complete data were available for 372 lesions in 21 patients. The frequency of biophysical parameter changes were: >10Ω reduction (80%), bipolar EGM reduction (69%), while loss of capture was uncommon (32%). Unipolar injury current was seen in 72% of radiofrequency applications. Both EGM reduction and impedance drop were seen in 57% and a change in all 3 parameters was seen in only 20% of lesions. Late potentials were eliminated in 33%, reduced/modified in 56%, and remained after ablation in 11%. Epicardial lesions exhibited an impedance drop (90% vs. 76%, P = 0.002) and loss of capture (46% vs. 27%, P < 0.001) more frequently than endocardial lesions. Lesions delivered manually exhibited a >10Ω impedance drop (83% vs. 71%, P = 0.02) and an EGM reduction (71% vs. 40%, P < 0.001) more frequently than lesions applied using magnetic navigation, although loss of capture, elimination of LPs, and a change in all 3 parameters were similarly observed. CONCLUSIONS VT ablation is inefficient as the majority of radiofrequency lesions do not achieve more than one targeted biophysical parameter. Only one-third of RF applications targeted at LPs result in complete elimination. Epicardial ablation within scar may be more effective than endocardial lesions, and lesions applied manually may be more effective than lesions applied using magnetic navigation. New technologies directed at identifying and optimizing ablation effectiveness in scar are clinically warranted.
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Affiliation(s)
- Tara Bourke
- UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
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13
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Martin-Saavedra FM, Cebrian V, Gomez L, Lopez D, Arruebo M, Wilson CG, Franceschi RT, Voellmy R, Santamaria J, Vilaboa N. Temporal and spatial patterning of transgene expression by near-infrared irradiation. Biomaterials 2014; 35:8134-8143. [PMID: 24957294 DOI: 10.1016/j.biomaterials.2014.06.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 06/03/2014] [Indexed: 01/23/2023]
Abstract
We investigated whether near-infrared (NIR) light could be employed for patterning transgene expression in plasmonic cell constructs. Hollow gold nanoparticles with a plasmon surface band absorption peaking at ∼750 nm, a wavelength within the so called "tissue optical window", were used as fillers in fibrin-based hydrogels. These composites, which efficiently transduce NIR photon energy into heat, were loaded with genetically-modified cells that harbor a heat-activated and ligand-dependent gene switch for regulating transgene expression. NIR laser irradiation in the presence of ligand triggered 3-dimensional patterns of transgene expression faithfully matching the illuminated areas of plasmonic cell constructs. This non-invasive technology was proven useful for remotely controlling in vivo the spatiotemporal bioavailability of transgenic vascular endothelial growth factor. The combination of spatial control by means of NIR irradiation along with safe and timed transgene induction presents a high application potential for engineering tissues in regenerative medicine scenarios.
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Affiliation(s)
- Francisco M Martin-Saavedra
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Hospital Universitario La Paz-IdiPAZ, 28046 Madrid, Spain
| | - Virginia Cebrian
- Hospital Universitario La Paz-IdiPAZ, 28046 Madrid, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Leyre Gomez
- Department of Chemical Engineering, Nanoscience Institute of Aragon (INA), University of Zaragoza, 50018 Zaragoza, Spain
| | - Daniel Lopez
- Institute of Polymer Science and Technology (ICTP-CSIC), 28006 Madrid, Spain
| | - Manuel Arruebo
- Department of Chemical Engineering, Nanoscience Institute of Aragon (INA), University of Zaragoza, 50018 Zaragoza, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Christopher G Wilson
- Center for Craniofacial Regeneration and Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA
| | - Renny T Franceschi
- Center for Craniofacial Regeneration and Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA
| | - Richard Voellmy
- Department of Physiological Sciences, University of Florida, Gainesville, FL 32611, USA
- HSF Pharmaceuticals S.A., 1814 La Tour-de-Peilz, Switzerland
| | - Jesus Santamaria
- Department of Chemical Engineering, Nanoscience Institute of Aragon (INA), University of Zaragoza, 50018 Zaragoza, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Nuria Vilaboa
- Hospital Universitario La Paz-IdiPAZ, 28046 Madrid, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
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14
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Shaw CJ, ter Haar GR, Rivens IH, Giussani DA, Lees CC. Pathophysiological mechanisms of high-intensity focused ultrasound-mediated vascular occlusion and relevance to non-invasive fetal surgery. J R Soc Interface 2014; 11:20140029. [PMID: 24671935 PMCID: PMC4006242 DOI: 10.1098/rsif.2014.0029] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 03/06/2014] [Indexed: 12/27/2022] Open
Abstract
High-intensity focused ultrasound (HIFU) is a non-invasive technology, which can be used occlude blood vessels in the body. Both the theory underlying and practical process of blood vessel occlusion are still under development and relatively sparse in vivo experimental and therapeutic data exist. HIFU would however provide an alternative to surgery, particularly in circumstances where serious complications inherent to surgery outweigh the potential benefits. Accordingly, the HIFU technique would be of particular utility for fetal and placental interventions, where open or endoscopic surgery is fraught with difficulty and likelihood of complications including premature delivery. This assumes that HIFU could be shown to safely and effectively occlude blood vessels in utero. To understand these mechanisms more fully, we present a review of relevant cross-specialty literature on the topic of vascular HIFU and suggest an integrative mechanism taking into account clinical, physical and engineering considerations through which HIFU may produce vascular occlusion. This model may aid in the design of HIFU protocols to further develop this area, and might be adapted to provide a non-invasive therapy for conditions in fetal medicine where vascular occlusion is beneficial.
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Affiliation(s)
- C. J. Shaw
- Imperial College London, Hammersmith Campus, Du Cane Road, London W12 0HS, UK
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3EG, UK
| | - G. R. ter Haar
- Joint Department of Physics, Institute of Cancer Research: Royal Marsden NHSF Trust, Downs Road, Sutton, Surrey SM2 5PT, UK
| | - I. H. Rivens
- Joint Department of Physics, Institute of Cancer Research: Royal Marsden NHSF Trust, Downs Road, Sutton, Surrey SM2 5PT, UK
| | - D. A. Giussani
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3EG, UK
| | - C. C. Lees
- Imperial College London, Hammersmith Campus, Du Cane Road, London W12 0HS, UK
- Department of Obstetrics and Gynaecology, University Hospitals Leuven, Campus Gasthuisberg, KU Leuven, Belgium
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15
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Liu M, Gu L, Sulkin MS, Liu H, Jeong EM, Greener I, Xie A, Efimov IR, Dudley SC. Mitochondrial dysfunction causing cardiac sodium channel downregulation in cardiomyopathy. J Mol Cell Cardiol 2013; 54:25-34. [PMID: 23123323 PMCID: PMC3595554 DOI: 10.1016/j.yjmcc.2012.10.011] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2012] [Revised: 10/04/2012] [Accepted: 10/24/2012] [Indexed: 01/01/2023]
Abstract
Cardiomyopathy is associated with cardiac Na(+) channel downregulation that may contribute to arrhythmias. Previously, we have shown that elevated intracellular NADH causes a decrease in cardiac Na(+) current (I(Na)) signaled by an increase in mitochondrial reactive oxygen species (ROS). In this study, we tested whether the NADH-mitochondria ROS pathway was involved in the reduction of I(Na) in a nonischemic cardiomyopathic model and correlated the findings with myopathic human hearts. Nonischemic cardiomyopathy was induced in C57BL/6 mice by hypertension after unilateral nephrectomy, deoxycorticosterone acetate (DOCA) pellet implantation, and salt water substitution. Sham operated mice were used as controls. After six weeks, heart tissue and ventricular myocytes isolated from mice were utilized for whole cell patch clamp recording, NADH/NAD(+) level measurements, and mitochondrial ROS monitoring with confocal microscopy. Human explanted hearts were studied using optical mapping. Compared to the sham mice, the arterial blood pressure was higher, the left ventricular volume was significantly enlarged (104.7±3.9 vs. 87.9±6.1 μL, P<0.05), and the ejection fraction was reduced (37.1±1.8% vs. 49.4±3.7%, P<0.05) in DOCA mice. Both the whole cell and cytosolic NADH level were increased (279±70% and 123±2% of sham, respectively, P<0.01), I(Na) was decreased (60±10% of sham, P<0.01), and mitochondrial ROS overproduction was observed (2.9±0.3-fold of sham, P<0.01) in heart tissue and myocytes of myopathic mice vs. sham. Treatment of myocytes with NAD(+) (500 μM), mitoTEMPO (10 μM), chelerythrine (50 μM), or forskolin (5 μM) restored I(Na) back to the level of sham. Injection of NAD(+) (100mg/kg) or mitoTEMPO (0.7 mg/kg) twice (at 24h and 1h before myocyte isolation) to animals also restored I(Na). All treatments simultaneously reduced mitochondrial ROS levels to that of controls. CD38 was found to transduce the extracellular NAD(+) signal. Correlating with the mouse model, failing human hearts showed a reduction in conduction velocity that improved with NAD(+). Nonischemic cardiomyopathy was associated with elevated NADH level, PKC activation, mitochondrial ROS overproduction, and a concomitant decrease in I(Na). Reducing mitochondrial ROS by application of NAD(+), mitoTEMPO, PKC inhibitors, or PKA activators, restored I(Na). NAD(+) improved conduction velocity in human myopathic hearts.
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Affiliation(s)
- Man Liu
- Section of Cardiology, Department of Medicine, University of Illinois at Chicago, USA
- the Jesse Brown VAMC, Chicago, IL, USA
| | - Lianzhi Gu
- Section of Cardiology, Department of Medicine, University of Illinois at Chicago, USA
- the Jesse Brown VAMC, Chicago, IL, USA
| | - Matthew S. Sulkin
- Department of Biomedical Engineering, Washington University in Saint Louis, USA
| | - Hong Liu
- Section of Cardiology, Department of Medicine, University of Illinois at Chicago, USA
- the Jesse Brown VAMC, Chicago, IL, USA
| | - Euy-Myoung Jeong
- Section of Cardiology, Department of Medicine, University of Illinois at Chicago, USA
| | - Ian Greener
- Section of Cardiology, Department of Medicine, University of Illinois at Chicago, USA
| | - An Xie
- Section of Cardiology, Department of Medicine, University of Illinois at Chicago, USA
| | - Igor R. Efimov
- Department of Biomedical Engineering, Washington University in Saint Louis, USA
| | - Samuel C. Dudley
- Section of Cardiology, Department of Medicine, University of Illinois at Chicago, USA
- the Jesse Brown VAMC, Chicago, IL, USA
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