A high-achieving Sydney mother of three who built a successful career in technology has died suddenly just weeks after giving birth, prompting her family to urge women to seek medical advice for seemingly minor symptoms.
Cathy MacGuinness, 40, suffered a cardiac arrest at her Marrickville home on Easter Sunday, only two weeks after welcoming her third daughter, Goldie. Her husband, Sebastian Fletcher, performed CPR until paramedics arrived and restored a pulse before she was rushed to Royal Prince Alfred Hospital, where she was placed in an induced coma.
Despite medical efforts, MacGuinness died on April 25 due to severe brain damage caused by prolonged oxygen deprivation. She leaves behind Fletcher and their three daughters — Zoe, 7, Rosie, 3, and newborn Goldie.
Jo Allen, MacGuinness’s best friend who organised a GoFundMe page to support the family, told 7NEWS.com.au that MacGuinness had an impressive career, most recently serving as Head of Operations at Alauda, an aerospace company, after working at Microsoft and Commonwealth Bank.
“She’s absolutely irreplaceable and we’re never going to find anyone like her again,” Allen said. “She made everyone feel like they were important — that’s a really special trait for someone to have.”
In the fundraiser, Allen described MacGuinness as someone who embraced life’s challenges head-on, “climbing whatever Mt Everest presented her with that day”. She wrote: “She shows up with her full self, always. She lights up any room she walks into — magic in human form.”
Allen highlighted MacGuinness’s thoughtful nature: “She reads the card you gave her on the spot, just to double the love in real time. She travels across the city to walk a friend to work. She drives you home at midnight. She buys the drinks despite not drinking any. She dances like no one’s watching. She accomplishes everything she sets her mind to, looks incredible doing it and still makes everyone else feel a million bucks at the end.”
MacGuinness’s greatest love was her family, especially her three daughters, who meant the world to her. Her sisters-in-law, Gillian Binchy-MacGuinness and Alison Scotland, said losing her was “the hardest thing” they had ever experienced.
“We said goodbye to the brightest spark ever,” they told 7NEWS.com.au, describing her as “magic in human form”. They noted that even the midwife who delivered Goldie later messaged her partner, saying: “This woman has just made my day.” The pair said MacGuinness could make that kind of impact quickly with people.
The family wants MacGuinness’s death to serve as a warning to other women not to ignore seemingly minor symptoms. She had an undiagnosed heart condition known as dilated cardiomyopathy, which causes the heart to enlarge and struggle to pump blood effectively. Symptoms can include fatigue, dizziness and swelling — signs often easy to dismiss, particularly for busy mothers.
“If she had been diagnosed and on the right medication, none of this would have happened,” they said. They are urging women — especially new and young mothers — not to put their own health last. “It’s so easy to dismiss yourself or just be like, ‘oh, I’m just tired’. Or, ‘yeah, I’ve been on my feet all day, that’s why my legs are swollen’, and not to give it a second thought because as a mother, you put everybody else in front of yourself,” they said. “Don’t dismiss even the smallest symptoms… go and see your GP.”
The fundraiser has raised more than $110,000 in 24 hours, with over 400 people contributing. The family said the outpouring of support reflects how many lives MacGuinness touched.
