News Video | Policy | GPs | Hospitals | Medical | Mental Health | Welfare | Search

 


First NZ patient to receive breakthrough heart device

Media Information

First New Zealand patient to receive breakthrough heart device

World’s first implantable cardioverter defibrillator suitable for fullbody MRI scan

What: Clinicians based at Tauranga Hospital are amongst the first international experts to implant breakthrough technology which helps to prevent sudden cardiac death in those at risk, without denying access to fullbody MRI scanning in the future. The Medtronic Evera MRI system is the first device which detects and treats dangerously high heart rates (tachycardia)and also allows fullbody MRI scanning under certain conditions. .

Implantable cardioverter defibrillators (ICD) have played an important role in preventing sudden cardiac arrest, however until now, patients with devices have been unable to receive full body MRI scans because of potential interactions between the MRI and device function. These patients have relied on CT scans or xrays which can fail to detect the same level of detail for conditions including tumours, muscle damage, and other internal injuries.

It is estimated that as many as 63 percent of ICD patients will need an MRI within 10 years of receiving a device.[i] The heart of a person in tachycardia can pump between 100 to 400 beats per minute. At these elevated rates, the heart is not able to efficiently pump oxygenrich blood to the body, causing shortness of breath, chest pain, lightheadedness or loss of consciousness. In severe cases, it can cause heart attack or death, which is known as Sudden Cardiac Arrest (SCA).[ii] Each year, an estimated 4,000 New Zealanders will experience SCA with only 8 percent (320 people) surviving the event. Defibrillation is the only definitive treatment for SCA, and survival decreases 710 percent for every minute without it.[iii] Sudden cardiac arrest can affect anyone; however detection is possible through appropriate screening including longterm cardiac monitoring.

In brief: Tauranga Hospital is the first facility in New Zealand to implant the breakthrough technology compatible with fullbody MRI scanning which detects and delivers therapy for patients at risk of sudden cardiac arrest (SCA).

Each year 4,000 New Zealanders experience an SCA event with only an 8 percent survival rate. SCA risk can be detected through appropriate screening and once detected clinicians will generally recommend implantable cardioverter defibrillator (ICD) therapy consistent with the treatment guidelines by the Cardiac Society of New Zealand.

What this means to patients: Each year, only 8 percent of the estimated 4,000 New Zealanders who experience a sudden cardiac arrest (SCA) survive. For those who do, the likelihood of experiencing a future SCA is six times greater than the general population. Implantable Cardioverter Defibrillator (ICD) therapy has been in used in New Zealand to prevent SCA for more than 15 years.

It is estimated that as many as 63 percent of ICD patients will need an MRI within 10 years of receiving a device.[iv] Because no ICD system has yet been approved for MRConditional use, patients with devices have been contraindicated from receiving MRI scans due to the potential interactions between the MRI and the ICD.

About the technology: Compared to other ICDs available, the Evera MRI system gives patients the most unrestricted access to MRI scans, and ultimately allows them to get the diagnostic answers they need. The device is paired with the Sprint Quattro® Secure family of ICD leads, which has 10 years of performance data with active monitoring[v] and can be used in an MRI environment.[vi] The system provides clinicians and patients with increased longevity, improved comfort, and fullbody MRI access.

MRI scans allow physicians to make a wide range of health diagnoses by viewing highly detailed images of internal organs, blood vessels, muscle, joints, tumours, and areas of infection. MRI utilises strong magnetic fields and radio frequency pulses to create images of structures inside the body.

Implantable cardioverter defibrillator (ICD) therapy is used to treat tachycardia (a heart rate that is too fast). An ICD continuously monitors the heart. If a dangerous and potentially lifethreatening heart rate is detected, a painless electrical signal is sent to correct it. If the electrical signal fails to convert the arrhythmia, a shock is delivered to correct the potentially lethal rhythm. In addition to the device, one or more leads (tiny insulated wire) are implanted to carry information signals from the heart to the ICD and when necessary, to carry electrical impulses to the heart.

About Tachycardia/Sudden cardiac arrest: Tachycardia is the term for a fast heart rate, more than 100 beats per minute and as many as 400 beats per minute. At these elevated rates, the heart is not able to efficiently pump oxygenrich blood to the body, causing shortness of breath, chest pain, lightheadedness or loss of consciousness. In severe cases, it can cause heart attack or death, which is known as Sudden Cardiac Arrest (SCA).[vii] Tachycardia can occur in either the upper or lower heart chambers. Causes of tachycardia include, but aren’t limited to, heart related conditions such as hypertension (highblood pressure), poor blood supply to the heart muscle due to coronary artery disease, heart failure, heart muscle disease, tumours or infections.viii

#Ends

i Turakhia M, Reynolds M, Wolff S, et al. Medtronic Data on File 2013. Data from 2011 MarketScan® Commercial and Medicare database, Truven Analysis, Inc. were used for this research. Patient cohort represents ICD patients in terms of age, gender, and major comorbidities (N = 10,778).


ii http://www.heart.org/idc/groups/heart-public/@wcm/@hcm/documents/downloadable/ucm_300290.pdf Accessed 24 Jan 2013

iii American Heart Association. AHA Scientific Position – Sudden Cardiac Death. Available at http://www.americanheart.org/presenter.jhtml?identifier=4741.


iv Turakhia M, Reynolds M, Wolff S, et al. Medtronic Data on File 2013. Data from 2011 MarketScan® Commercial and Medicare database, Truven Analysis, Inc. were used for this research. Patient cohort represents ICD patients in terms of age, gender, and major comorbidities (N = 10,778).


v Medtronic Product Performance Report, 2012 Second Edition, Issue 66.


vi Models 6935M (55cm, 62cm) and 6947M (55cm, 62cm)

vii http://www.heart.org/idc/groups/heart-public/@wcm/@hcm/documents/downloadable/ucm_300290.pdf Accessed 24 Jan 2013

viiihttp://www.medtronic.com.au/your-health/tachycardia/index.htm Accessed 24 Jan 2013

© Scoop Media

 
 
 
 
 
Culture Headlines | Health Headlines | Education Headlines

 
Review: Howard Davis On Olivier Assayas' 'Personal Shopper'

Olivier Assayas’ Personal Shopper is stylish, mysterious, and very strange indeed. It manages to be both ghost story and suspense thriller, yet also a portrait of numbed loneliness and ennui , held together by an peculiarly inexpressive performance from ... More>>

Howard Davis: Never Too Old To Rock & Roll - Jethro Tull

As Greil Marcus recently observed in an NYRB review of Robbie Robertson's autobiographical Testimony, in rock and roll there is always an origin story. In the case of Jethro Tull founder Ian Anderson, he claims to have been influenced by his father's big band and jazz record collections and the emergence of rock music in the 1950s, but became disenchanted with the "show biz" style of early US stars like Elvis Presley... More>>

October: Alice Cooper Returns To NZ

It was March 1977 when Alice Cooper undertook his first ever concert tour of New Zealand – and broke attendance records. 40 years on and this revered entertainer continues to surprise and exude danger at every turn, thrilling audiences globally! More>>

ALSO:

Howard Davis Review: The Contemporary Relevance Of Denial

Denial has all the hallmarks of a riveting courtroom drama. Based on a 1996 British libel case that author David Irving brought against Lipstadt, the movie has been criticized as flat and stagey, but it nonetheless conveys a visceral clarity of vision and sense of overwhelming urgency. More>>

Obituary: John Clarke Dies Aged 68

Andrew Little: “I grew up with Fred Dagg and I am devastated by John Clarke’s death. He taught us to laugh at ourselves and more importantly laugh at our politicians.” More>>

ALSO:

Howard Davis: Colin McCahon's 'on Going Out With The Tide'

Curated by Wystan Curnow and Robert Leonard, On Going Out with the Tide features major works that have been assembled from public and private collections across New Zealand and Australia. It focusses on McCahon’s evolving engagement with Māori subjects and themes, ranging from early treatments of koru imagery to later history paintings which refer to Māori prophets and investigate land-rights issues. More>>

Howard Davis: Rodger Fox Gets Out The Funk

By now a living New Zealand legend, band leader and trombonist Rodger Fox has performed with some of the biggest names in the jazz business, including Louie Bellson, Bill Reichenbach, Chuck Findley, Randy Crawford, Bobby Shew, Lanny Morgan, Bruce Paulson, Diane Schuur, Arturo Sandoval, David Clayton-Thomas, and Joe Williams, to name only a few. More>>

Get More From Scoop

 
 

LATEST HEADLINES

 
 
 
 
Health
Search Scoop  
 
 
Powered by Vodafone
NZ independent news