Meet Our Team
Sonny J.H. Wong, MD, FACC, RPHS
Founder/Cardiologist
Early on in his medical career, Dr. Wong was working in an emergency room when a patient went into cardiac arrest. He watched in awe as the attending doctor remained calm and logical faced with a life or death situation. This experience led Dr. Wong to not only specialize in cardiology but emulate how this physician practiced medicine.
In his nearly 30 years of experience in cardiology, Dr. Wong has done just that. His patients note that he is caring, thorough, and an excellent listener and communicator. As a cardiologist, his goal is to make a difference in every patient’s life.
Dr. Wong graduated from University of Otago Dunedin Medical School in New Zealand where he is originally from. He completed his internal medicine and cardiology training at the University of Hawaii and University of Nevada respectively, with board certifications from the American Board of Internal Medicine in both. He is a Fellow of the American College of Cardiology and has been caring for patients in Hawaii since 1994.
As a professor on the volunteer clinical faculty at the University of Hawaii John A. Burns School of Medicine, Dr. Wong teaches first-year clinical skills and the fourth-year cardiology rotation. In an effort to impart some of the wisdom shared by his own mentors, he teaches students to think logically by ensuring a complete and competent medical history is obtained and examining the patient for clues supporting a hypothesis.
An avid golfer, you can find Dr. Wong on the golf course at least twice a week with his friends.
Kahealani Rivera, MD
Cardiologist
Dr. Kahealani Rivera is a board-certified cardiovascular disease specialist with over a decade of experience in managing a wide range of heart conditions. She focuses on patient-centered care, empowering individuals to take charge of their heart health through modern diagnostic and therapeutic methods. Dr. Rivera earned her medical degree from Stanford University and completed her residency and cardiovascular fellowship at the University of Hawai’i.
She has held leadership roles, including President of the American Heart Association, Hawai’i Chapter, and has been active in the Philippine Medical Association of Hawai’i. Dr. Rivera is also a mentor for the University of Hawai’i’s Cardiology Fellowship Program, guiding future cardiovascular specialists.
Her special interests include refractory hypertension and cardiovascular disease in women and ethnic minorities. Dr. Rivera is committed to improving community health and providing compassionate, high-quality care.
Natalie Mansanas, PA-C
Physician Assistant
Natalie Mansanas is a board-certified Physician Assistant specializing in vein and cardiovascular care. She has been practicing in Hawaii since 2011 and brings over 15 years of experience in cardiology.
Her current clinical focus includes advanced vein treatments such as Varithena®, VenaSeal™, radiofrequency (RF) ablation, sclerotherapy, and laser therapy. In addition to procedural care, Natalie has extensive experience managing a wide range of cardiovascular conditions, including heart failure, atherosclerotic cardiovascular disease (ASCVD), atrial fibrillation, congestive heart failure, cardiomyopathy, and complex hypertension. She also provides comprehensive lipid management and preventive cardiovascular care.
Natalie is highly experienced in cardiac diagnostics and procedures, including implanting implantable loop recorders, performing and interpreting stress tests, and reading event monitors. She is known for her thorough, patient-centered approach and her ability to manage both acute and chronic cardiovascular conditions.
She graduated from the accelerated Physician Assistant Program at Florida International University and Miami Dade College in 2010 and has dedicated her career to cardiology ever since. She joined the Heart and Vein Hawaii ‘Ohana in 2022.
Fluent in English and Spanish, Natalie values building strong, lasting relationships with her patients and guiding them through their care with clarity and compassion.
Outside of work, Natalie is married with two children and enjoys spending time with her family. On weekends, they can often be found outdoors snorkeling, surfing, paddling, or attending their children’s activities.
Rina Rousek, NP
Nurse Practitioner
With over 10 years of experience in Internal Medicine and cardiology, Rina Rousek, NP, is dedicated to providing patient-centered, evidence-based care to patients across Hawaiʻi. Originally from Japan, she earned her Nurse Practitioner degree from Creighton University in Omaha, Nebraska, and completed her Internal Medicine training at Creighton University Medical Center. There, she received strong clinical training and gained extensive experience managing complex medical conditions, including cardiovascular disease, while working closely with physicians to deliver comprehensive care.
After getting married on Oʻahu and honeymooning on Maui, Rina fell in love with the island and ultimately made it her home. She has been caring for patients in the Maui community since 2021.
Rina’s mission is to improve patients’ overall cardiovascular health and quality of life, with a special focus on preventive care, optimizing heart health, and reducing the risk of heart attacks and other cardiovascular events.
Outside of work, Rina enjoys staying active and can often be found playing pickleball, hiking, swimming, snorkeling with turtles, and exploring the natural beauty of Maui.
Hollie Lum
Operations Manager
With over 20 years of experience working in the medical field, Hollie’s combination skill sets of strategic planning, product development and risk analysis has propelled our practice to higher grounds. Hollie’s creative perspective has merged the worlds of Cardiology and Cosmetology to create a new generation of Heart and Vein Hawaii where we are now able to offer an array of services across the island. We are grateful to have her as a part of our growing team and for leading the way in bringing our practice’s fullest potential to fruition.
When Hollie is not busy keeping things organized for our team, she enjoys spending time with family and friends and trying out new restaurants around town.