[2025-10-01T17:33:35.938682] [QUERYOME] Starting research for query 336: 'Instructions:
 Answer the question below. First, respond with the single best option letter (A, B, C, or D). Then provide a concise reasoning (1–3 sentences). Use both the retrieved evidence and your own medical knowledge to choose the most accurate answer.

Question:
Lidocaine produces its antiarrhythmic effects by

Options:
A. Increasing A-V conduction
B. Decreasing cardiac excitability
C. Increasing cardiac conduction velocity
D. Increasing spontaneous pacemaker activity'
[2025-10-01T17:33:35.981208] [PI] Starting research for query: 'Instructions:
 Answer the question below. First, respond with the single best option letter (A, B, C, or D). Then provide a concise reasoning (1–3 sentences). Use both the retrieved evidence and your own medical knowledge to choose the most accurate answer.

Question:
Lidocaine produces its antiarrhythmic effects by

Options:
A. Increasing A-V conduction
B. Decreasing cardiac excitability
C. Increasing cardiac conduction velocity
D. Increasing spontaneous pacemaker activity'
[2025-10-01T17:33:35.982806] Saving text to bench_final/run1/medmcqa/medmcqa_1896/pi_initial_prompt.txt
[2025-10-01T17:33:35.987402] [PI] Calling o3 for initial analysis...
[2025-10-01T17:33:42.492763] [PI] Reasoning iteration 1
[2025-10-01T17:33:42.494409] [PI reasoning] **Explaining lidocaine's mechanism**

I want to clarify lidocaine's anti-arrhythmic mechanism. It's a class IB sodium channel blocker that reduces cardiac excitability by decreasing phase 0 depolarization in ischemic tissue. So, the best choice here is option B. I should provide concise reasoning for that. Since this is a straightforward question, I can quickly look for evidence to support my answer, and I will make sure to include citations for clarity.
[2025-10-01T17:33:42.497139] [PI] Executing function call 1: hybrid_search
[2025-10-01T17:33:42.498871] [PI] Function arguments: {'query': 'lidocaine antiarrhythmic mechanism decreases cardiac excitability class IB sodium channel blocker decreases automaticity', 'k': 10, 'faiss_weight': 0.6, 'bm25_weight': 0.4, 'use_rrf': True}
[2025-10-01T17:33:42.508843] Saving JSON to bench_final/run1/medmcqa/medmcqa_1896/pi_iteration_1_tool_call_2_hybrid_search.json
[2025-10-01T17:33:44.515452] [PI] Function hybrid_search executed successfully
[2025-10-01T17:33:44.517906] Saving JSON to bench_final/run1/medmcqa/medmcqa_1896/pi_iteration_1_tool_result_2_hybrid_search.json
[2025-10-01T17:33:44.542667] [PI] Continuing reasoning with 1 function responses...
[2025-10-01T17:33:48.299236] [PI] Reasoning iteration 2
[2025-10-01T17:33:48.309647] [PI] Executing function call 1: bm25_author_keywords_search
[2025-10-01T17:33:48.312064] [PI] Function arguments: {'query': 'lidocaine decreases cardiac excitability', 'k': 10}
[2025-10-01T17:33:48.313723] Saving JSON to bench_final/run1/medmcqa/medmcqa_1896/pi_iteration_2_tool_call_2_bm25_author_keywords_search.json
[2025-10-01T17:33:49.081291] [PI] Function bm25_author_keywords_search executed successfully
[2025-10-01T17:33:49.083361] Saving JSON to bench_final/run1/medmcqa/medmcqa_1896/pi_iteration_2_tool_result_2_bm25_author_keywords_search.json
[2025-10-01T17:33:49.089227] [PI] Continuing reasoning with 1 function responses...
[2025-10-01T17:33:56.510117] [PI] Reasoning iteration 3
[2025-10-01T17:33:56.513361] [PI] No function calls found in response
[2025-10-01T17:33:56.515685] [PI] No more function calls - research complete
[2025-10-01T17:33:56.517983] Saving text to bench_final/run1/medmcqa/medmcqa_1896/pi_final_answer.txt
[2025-10-01T17:33:56.527357] [QUERYOME] Query completed successfully
