A 58-year-old heart patient who caught swine flu died in a Hong Kong hospital yesterday. The cause of death is still subject to a coroner's investigation. If swine flu is confirmed to be the cause, he will become the first Hong Kong permanent resident to die from the disease. The patient, who had a history of heart disease, was taken to Princess Margaret Hospital on Thursday night suffering from fever, a cough and shortness of breath. A preliminary X-ray examination found he had suffered a chest infection and he had follow up treatment after being admitted. He was in critical condition and was placed on a machine to aid breathing, and also given antibiotics. Yesterday, the man's condition deteriorated and he suffered cardiac arrest and was certified dead at 3.54pm. A sample taken for laboratory testing confirmed the patient had been suffering from swine flu. The antiviral drug Tamiflu was prescribed for his family. A spokeswoman for the hospital said the case had been referred to the coroner to investigate the cause of death. Last month, a 37-year-old Filipino maid and a 42-year-old Filipino sailor died from swine flu. The sailor died on July 10 and the maid on Monday this week. Meanwhile, the health minister said yesterday there were sufficient supplies of Tamiflu in the city to treat flu patients. York Chow Yat-ngok said Hong Kong was still in the middle of the flu season. Swine flu and another strain, H3N2, accounted for 50 per cent each of all flu cases. Tamiflu was still proving to be effective in dealing with both the viruses, he said. 'The supply of Tamiflu is sufficient in Hong Kong. We believe the current demand [for the drug] is less than 5 to 10 per cent of our total stock,' he said after a visit to Kwun Tong District Council. He also reminded people, especially the elderly and children, to seek vaccination against seasonal flu despite a genetic change observed in the H3N2 strain in April, which could affect the vaccine's effectiveness. 'The genetically changed strain may affect [the effectiveness of the seasonal flu vaccine] to some extent, but the vaccine actually still works for three types of virus, which are H1, H3 and B type,' Dr Chow said. Health Department figures yesterday showed there were 214 swine flu cases reported in the 24 hours to 2.30pm, taking the total number in the city to 3,673. The man who died yesterday was confirmed with swine flu at 7pm, about three hours after he died. The new cases involve 104 males and 110 females, aged between 16 months and 72 years. Ng Wah Catholic Secondary School in Kowloon had to suspend classes after 17 Form Four pupils, four Form Two pupils and a staff member developed flu symptoms last week. Of these, two have been confirmed as swine flu cases. Kwai Chung Hospital in the New Territories announced that five patients, aged 33 to 76, in one of its male wards had fever and flu symptoms. Test results on four of them were positive for influenza A. All of the patients have been isolated and are in stable condition. The hospital has suspended admissions and ward visits and reported the cases to the Hospital Authority and the Centre for Health Protection.