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By:

Quaid Najmi

4 January 2025 at 3:26:24 pm

Cold wave triggers spike in cardiac arrests

Mumbai : As winter temperatures go for a spin across the country, hospitals are witnessing a significant surge of around 25-30 pc in cardiac emergencies, a top cardiologist said.   According to Interventional Cardiologist Dr. Hemant Khemani of Apex Group of Hospitals, cold air directly affects how the heart functions.   “Low temperatures make blood vessels tighten. When the arteries narrow, blood pressure shoots up and the heart has to work harder to push the blood through the stiffened...

Cold wave triggers spike in cardiac arrests

Mumbai : As winter temperatures go for a spin across the country, hospitals are witnessing a significant surge of around 25-30 pc in cardiac emergencies, a top cardiologist said.   According to Interventional Cardiologist Dr. Hemant Khemani of Apex Group of Hospitals, cold air directly affects how the heart functions.   “Low temperatures make blood vessels tighten. When the arteries narrow, blood pressure shoots up and the heart has to work harder to push the blood through the stiffened vessels,” said Dr. Khemani.   Elaborating on the direct effects of cold air on heart functioning, he said that low temperatures make blood vessels tighten, when arteries narrow, blood pressure shoots up and the heart must work harder to push blood through stiffened vessels.   Winter also thickens the blood, increasing the likelihood of clot formation and these combined effects create a dangerous ‘demand-supply mismatch’ for oxygen, especially in people with existing heart conditions.   This trend has caused concern among cardiologists as it adds to India’s already heavy cardiovascular diseases burden – with nearly one in four deaths linked to heart and blood vessel problems.   Dr. Khemani said that sudden temperature transitions - from warm rooms to chilly outdoors - can put additional strain on the heart and risks. “This abrupt shift loads the cardiovascular system quickly, raising the risk of a sudden (cardiac) event among vulnerable individuals.”   Lifestyle Patterns Added to these are the changes in lifestyle patterns during winter month that further amplify the danger. Most people reduce physical activities, eat richer foods, and often gain weight all of which combine to raise cholesterol levels, disrupt blood-sugar balance and push up blood pressure.   Complicating matters for the heart are the social gatherings during the cold season that tends to bring higher intake of smoking and alcohol, said Dr. Khemani.   Recommending basic preventive measures, Dr. Khemani said the chest, neck and hands must be kept warm to prevent heat loss, maintain a steady body temperature and reduce the chances of sudden blood pressure spikes, a low-salt diet, home-cooked meals, shot indoor walks post-eating, adequate hydration and at least seven hours of sleep.   He warns against ignoring warning signals such as chest discomfort, breathlessness, unexplained fatigue, or sudden sweating, pointing out that “early medical care can significantly limit heart damage and improve survival.”   The rise in winter heart risks is not unique to India and even global health agencies like World Health Federation and World Health Organisation report similar patterns.   The WHF estimates that more than 20 million people die of heart-related causes each year - equal to one life lost every 1.5 seconds, and the WHO has listed heart disease as the world’s leading cause of death for five consecutive years.   Seniors affected more by winter chills  Cold weather can hit the heart at any age, but the risk is noticeably higher for men aged above  45 and in women after 55, with the highest danger curve in people over 60, and elders with co-morbidities and history of heart diseases.   “People with existing cardiac problems face greater trouble in winter as the heart has to work harder. Even those without known heart disease can sometimes experience winter heart attacks, as chilly conditions may expose hidden blockages or trigger problems due to sudden exertion, heavy meals, smoking or dehydration,” Dr. Khemani told  ‘ The Perfect Voice’ .   However, contrary to perceptions, cold-weather heart issues have no connection to the COVID-19 vaccine, nor is there any scientific evidence linking the two, he assured.

Choking Mumbai

For decades, Mumbai was perceived as a rare urban oasis, where the saline sweep of the Arabian Sea blunted the worst ravages of India's air pollution. That illusion has now been dispelled. A meticulous four-year study by Respirer Living Sciences (RLS), using data from its AtlasAQ platform, reveals the bleak truth that the city’s air is thick with pollutants all year round, with no ‘clean season’ left.


Mumbai’s annual average levels of PM10 (particulate matter ten microns or less in diameter) have consistently breached the national safety threshold of 60 micrograms per cubic metre (μg/m³). This is not merely a seasonal malaise tied to cooler winter months, as once assumed. Alarmingly, the city’s pollution levels persist even through the hot season, a time when improved atmospheric dispersion should offer natural reprieve.


Across the city - from Chakala in Andheri East to Deonar, Kurla, Vile Parle West and Mazgaon - pollution has become an unrelenting, ubiquitous presence.


The culprits are well known: traffic emissions from a burgeoning number of vehicles; unregulated dust from frenzied construction; industrial activity in and around the ports; and a conspicuous lack of dust control measures. Mumbai’s ceaseless growth now risks becoming a chronic liability.


Worryingly, the regulatory response remains sluggish. Mumbai’s urban planning continues to treat clean air as a peripheral concern, not a foundational necessity. Development plans rarely integrate environmental impact assessments in a meaningful way.


A sharper, citywide strategy is urgently needed. Dust suppression rules at construction sites must be enforced strictly, with financial penalties for violators and incentives for best practices. Traffic management systems should be overhauled to ease congestion and encourage the use of public transport. Expansion of clean, reliable mass transit network needs to be urgently prioritised. In addition, comprehensive real-time air monitoring at the ward level should be deployed, enabling authorities to respond to localised pollution spikes swiftly rather than relying on citywide averages that conceal dangerous hotspots.


Longer-term, clean air targets must be hardwired into the city’s master planning and transport policies. Green buffers along major traffic corridors, stricter emission norms for commercial vehicles and incentives for rooftop gardens and urban afforestation could all play a part. Industrial zones near port areas should be subjected to rigorous air quality compliance measures, not token self-certifications. Private developers and large infrastructure firms, often among the worst offenders, must be made stakeholders in the clean air mission through binding regulations.


Mumbai’s commercial dynamism - as a magnet for migrants, entrepreneurs and investors - depends not just on glittering skyscrapers but on something far more basic: the ability to breathe. Unless clean air becomes an unshakeable priority, the city risks suffocating its own future. For a metropolis that prides itself on its resilience against terror attacks, monsoon floods and economic shocks, the real test will be whether it can muster the will to fight an invisible, pervasive enemy slowly corroding the lives of its 20 million citizens.

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