✅ No, we couldn't find enough information on major authoritative news outlets directly relating to a former startup employee revealing a heart attack caused specifically by relentless pressure, late nights, gaslighting, nepotism, impossible clients, and lack of respect.

However, we found relevant reports about startup founders and CEOs who have suffered cardiac arrests or fatal heart attacks, often linking these to the intense stress and pressures common in the startup ecosystem:

1. Indian Express reported the death of Amit Banerji, CEO of Table Space, from sudden cardiac arrest at age 45, highlighting that stress is a major factor affecting young startup founders and how stress hormones can worsen arterial plaque risks. It emphasizes the toll of stress on heart health but does not specify conditions like gaslighting or nepotism as causes. (Trust Score 8/10)

https://indianexpress.com/article/health-wellness/cardiac-arrest-table-space-ceo-amit-banerji-sudden-death-40s-trigger-heart-attack-9766081/

2. Outlook Business discussed the mental health crisis among startup founders due to extreme pressures and long hours, triggered by investor demands, which can lead to burnout and serious health consequences including heart attack. It mentions multiple CEO deaths related to stress but does not detail gaslighting or impossible clientele specifically. (Trust Score 7/10)

https://www.outlookbusiness.com/start-up/news/wake-up-call-for-start-up-founders-table-space-ceos-death-raises-mental-health-concerns

3. Economic Times covered multiple Indian CEOs and founders who died young from cardiac arrest, pointing to stress and leadership burdens as common contributing factors. This sheds light on the broader trend but without personal testimonies about specific workplace toxicities like nepotism or disrespect. (Trust Score 8/10)

https://economictimes.com/magazines/panache/rohan-mirchandani-death-5-ceos-and-company-founders-who-died-too-young-from-cardiac-arrest/articleshow/116571135.cms

In summary, the theme that stress and relentless pressure in startups can lead to serious heart problems and fatal outcomes is supported by credible sources, especially highlighting founder deaths due to cardiac arrest. However, the detailed personal narrative involving gaslighting, nepotism, impossible clients, and disrespect by a former startup employee as the direct cause of a heart attack is not corroborated by major news outlets.