Intravenous haloperidol (OR 3.18), septic shock (OR 2.84), and acute kidney injury (OR 2.26) independently predicted ICU-acquired QTc prolongation, which occurred in 32% of critically ill patients.
Cohort (n=812)
Yes
In critically ill patients in Pakistan, ICU-acquired QTc prolongation is common (32%) and independently associated with septic shock, acute kidney injury, and haloperidol use, leading to higher mortality and longer ICU stays.
Effect estimate: OR 3.18 (95% CI 1.88-5.37)
p-value: p=<0.0001
Abstract Background Prolonged corrected QTcs are a frequent and potentially life-threatening finding In ICU patients, the presence of prolonged QTc is a prevalent and potentially life-threatening condition, as it increases the risk of TdP and sudden cardiac death. Risk factors include sepsis, electrolyte imbalances, and QTc-prolonging drugs. However, data from South Asian ICUs remain limited. Methods We conducted a 12-month prospective observational study in two tertiary care ICUs in Lahore and Karachi, enrolling 812 adult patients without pre-existing QTc abnormalities. QTc was calculated using Bazett’s formula, with prolongation defined as QTc ≥ 450ms (men) or QTc ≥ 470 ms (women). Clinical, biochemical, and pharmacologic data were collected. Multivariate logistic regression identified independent predictors of ICU-acquired QTc prolongation. Results QTc prolongation occurred in 260 (32.0%) patients. These individuals had higher rates of sepsis (55%), acute kidney injury (45%), and electrolyte disturbances (hypokalemia 35%, hypomagnesemia 30%). QTc-prolonging medications, particularly haloperidol (22%), were more common among cases. Septic shock, coronary artery disease, renal dysfunction, and haloperidol were significant independent predictors. Prolonged QTc was associated with longer ICU stays (median 10 vs. 5 days) and higher mortality (45% vs. 18%, p < 0.001). Conclusion In this inaugural multicenter study conducted in Pakistan, it was observed that one-third of patients in the ICU experienced QTc prolongation, which was associated with sepsis, renal dysfunction, and the administration of specific medications. These findings underscore the importance of QTc monitoring, electrolyte management, and cautious drug selection to reduce arrhythmia-related complications.
Awan et al. (Fri,) conducted a cohort in Critically ill ICU patients (n=812). Intravenous haloperidol vs. No intravenous haloperidol was evaluated on ICU-acquired QTc prolongation (OR 3.18, 95% CI 1.88-5.37, p=<0.0001). Intravenous haloperidol (OR 3.18), septic shock (OR 2.84), and acute kidney injury (OR 2.26) independently predicted ICU-acquired QTc prolongation, which occurred in 32% of critically ill patients.