What question did this study set out to answer?

To assess the correlation between rate-corrected QT interval prolongation and serum sotalol concentrations following low-dose oral and intravenous administration.

January 1, 2010Cardiology

QT Prolongation and Serum Sotalol Concentration Are Highly Correlated following Intravenous and Oral Sotalol

View Full Paper

Ask AI

Bookmark

Why the study?

Does serum sotalol concentration correlate with QT prolongation following single low doses of oral and intravenous sotalol in healthy volunteers?

Population

15 healthy volunteers

Comparison

75 mg intravenous sotalol over 2.5 h and 80 mg… vs Intravenous vs oral administration

Design

RCT, random order

Follow-up

7 times following dosings

Authors

JSJohn C. SombergHebrew Theological College RPRichard A. PrestonUniversity of Miami VRVasant RanadeRush University Medical Center

Discussion

Member takes

Implication

Supports QTc-guided sotalol dosing; confirms robust concentration-QTc correlation for both oral and intravenous routes.

Key Points

To assess the correlation between rate-corrected QT interval prolongation and serum sotalol concentrations following low-dose oral and intravenous administration.
Fifteen healthy volunteers received 75 mg of intravenous sotalol over 2.5 hours and 80 mg of oral sotalol in a randomized sequence.
Serum drug concentrations and 12-lead electrocardiograms were recorded simultaneously at baseline and at seven time points post-administration.
QTc was determined using Bazett, Fridericia, and Framingham formulas, and linear regression analysis was applied to evaluate concentration-effect relationships.
Significant QT prolongation occurred at very low sotalol doses and serum concentrations.
QTc values calculated by Framingham and Fridericia formulas exhibited strong, nearly identical linear correlations with serum sotalol concentrations (r ≥ 0.97, p < 0.001) for both administration routes.
The linear model QTc = 0.0342 (sotalol concentration) + 398 accurately predicted QTc intervals across measured serum concentrations.

Structured PICO

Does serum sotalol concentration correlate with QT prolongation following single low doses of oral and intravenous sotalol in healthy volunteers?

Population

15 healthy volunteers

Intervention

75 mg intravenous sotalol over 2.5 h and 80 mg oral sotalol administered in a random order

Comparator

Intravenous vs oral administration (crossover design)

Outcome

Correlation between QT interval (QT) and serum sotalol concentrationsurrogate

Serum sotalol concentration is highly correlated with QTc prolongation across the entire concentration range for both oral and intravenous administration, allowing QT effects to guide dose increases.

Cite This Study

Somberg et al. (2010) studied this question.

synapsesocial.com/papers/6a8bcb6f3fd21775a533baef https://doi.org/10.1159/000316050

View Full Paper

Ask AI

Bookmark

QT Prolongation and Serum Sotalol Concentration Are Highly Correlated following Intravenous and Oral Sotalol

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

QT Prolongation and Serum Sotalol Concentration Are Highly Correlated following Intravenous and Oral Sotalol

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Also Consider